Japanese Stewed Eggplant Recipe with Ginger and Dashi

Japanese stewed eggplant, often called nasu no nimono, is tender eggplant simmered in a savory broth of dashi, soy sauce, mirin, and ginger. This home-style Japanese dish is easy to make on the stovetop, delicious warm or at room temperature, and especially good with rice because the eggplant soaks up the seasoned broth.

Ingredients

6 medium Japanese eggplants, about 1½ lb (680 g) total
1½ cups (360 ml) dashi stock, homemade or prepared from instant dashi
2 tablespoons (30 ml) soy sauce
2 tablespoons (30 ml) mirin
1 tablespoon (15 ml) sake
1 teaspoon (4 g) granulated sugar
1 tablespoon (6 g) finely grated fresh ginger
1 tablespoon (15 ml) neutral cooking oil, such as canola or grapeseed oil
1 teaspoon (3 g) toasted sesame seeds, for serving
2 scallions, about 1 oz (30 g), thinly sliced, for serving

Instructions

Prepare the eggplant. Rinse the eggplants and dry them well. Trim off the stems, then cut each eggplant lengthwise in half. If they are especially long, cut each half crosswise into pieces about 2 inches (5 cm) long. With the tip of a small knife, make shallow diagonal scores across the skin, spacing the cuts about ½ inch (1 cm) apart. Do not cut deeply into the flesh; the scores should help the broth season the eggplant while allowing each piece to hold its shape.
Mix the simmering broth. In a small bowl or measuring cup, stir together the dashi, soy sauce, mirin, sake, sugar, and grated ginger. Mixing the liquid before it reaches the pan makes it easy to add evenly and prevents the sugar from sticking in one spot. If using instant dashi, prepare the stock according to the package directions, then measure out 1½ cups (360 ml).
Brown the eggplant. Set a large, lidded skillet or sauté pan over medium heat. Add the oil and swirl to coat the bottom. Arrange the eggplant in one layer, cut sides down; work in batches if the pan is crowded. Cook for about 4 minutes, until the cut sides are lightly golden, then turn and cook for another 4 minutes. The goal is to soften and lightly color the surfaces, not to cook the centers through. If the pan looks dry between batches, add a small splash of oil.
Simmer until tender. Return all the eggplant to the pan, if necessary, and pour in the broth mixture. Bring it just to a gentle boil, then lower the heat so the liquid bubbles softly. Cover and simmer for 11 minutes. Check a piece by piercing the thickest part with a thin knife: it should be tender but not collapsing. If the pieces are still firm, cover and simmer for 2 to 3 minutes more.
Reduce the broth and rest. Remove the lid and simmer for about 3 minutes, spooning broth over the eggplant once or twice. This slightly concentrates the seasoning without turning the liquid into a thick glaze. Take the pan off the heat and leave the eggplant in the broth for 10 minutes so the flavor can settle into the flesh. Serve warm or at room temperature, topped with sesame seeds and scallions.

Tips

Choose eggplants that cook evenly. Japanese eggplants are long, narrow, and thin-skinned, so they become tender quickly and are easy to portion. If you only have globe eggplant, use one large eggplant weighing about 1½ lb (680 g), cut it into thick wedges, and check tenderness after 12 minutes of simmering. Globe eggplant has a firmer, meatier texture and may need a few extra minutes.
Keep the broth at a gentle simmer. A hard boil can break up soft eggplant and make the pieces look ragged. Lower the heat as soon as the liquid begins bubbling, and use a pan wide enough for the eggplant to sit in a mostly even layer. If your pan is narrow, turn the pieces carefully once during simmering so they cook evenly.
Adjust seasoning at the end. Dashi concentrates differently depending on whether it is homemade or made from a particular instant powder. Taste a spoonful of broth after the eggplant is tender. If it needs more savoriness, add soy sauce ½ teaspoon (2.5 ml) at a time; if it tastes too strong, stir in a tablespoon (15 ml) of water or dashi. Avoid adding much salt before tasting, since soy sauce and some dashi powders are already salty.
Use the best available stock and a simple mirin swap. Dashi made with kombu and dried bonito flakes gives the broth a distinctly savory Japanese flavor. For a vegetarian version, choose kombu dashi or a clearly labeled vegetarian instant dashi; ordinary instant dashi often contains fish. If mirin is unavailable, use 1 tablespoon (15 ml) sake plus 1 teaspoon (4 g) sugar in its place. The result will be a little less rounded and sweet than one made with mirin.

Serving Suggestions

Serve the eggplant as a small side dish alongside a bowl of steamed Japanese short-grain rice. Spoon a little of the cooking broth over the rice, too; it is flavorful without being heavy, and the rice catches any liquid left on the plate. The dish also fits naturally into a larger Japanese-style meal with miso soup, grilled fish or tofu, and a simple cucumber or leafy-green side.

For a more substantial lunch, put the eggplant and a few spoonfuls of broth over a bowl of rice, then add sliced scallions and sesame seeds. Keep the pieces intact rather than mashing them, so each bite has a tender center and seasoned skin. If serving it as part of a spread, transfer the eggplant to a shallow dish and pour the broth around it. A shallow dish makes it easier for diners to reach both the vegetables and the flavorful liquid.

This recipe is good warm soon after cooking, but it is also pleasant at room temperature. That makes it convenient to prepare a little ahead of a meal: allow it to rest in its broth, then bring it to the table without trying to keep it piping hot. If it has been refrigerated, follow the reheating guidance below rather than leaving it out for an extended time.

Variations

Make it vegetarian. Use kombu-only dashi or a vegetarian dashi powder instead of stock made with bonito. The broth will be lighter and more seaweed-forward, but it still pairs well with soy sauce, ginger, and eggplant. Check the label on prepared dashi, since many convenient powders include fish even when the package looks like a general-purpose stock seasoning.

Add a little heat. Stir a small pinch of dried red chile flakes into the broth, or serve the finished dish with a little shichimi togarashi at the table. Start modestly: the purpose is to add warmth behind the savory broth, not to overwhelm the eggplant. A few drops of toasted sesame oil at serving time can add a nutty aroma, although it is optional and stronger than neutral cooking oil.

Use different Japanese eggplant shapes. Small round Japanese eggplants can be halved or quartered, depending on their size. Keep the pieces similar in thickness so they become tender at about the same time. If using larger globe eggplant, cut it into wedges with some skin on each piece; the skin helps the wedges hold together during simmering. Because globe eggplant is thicker, allow a few extra minutes and test with a knife.

Finish with another garnish. Along with or instead of scallions, add a few thin strips of fresh shiso if it is available. Shiso has a fresh, herbal flavor that contrasts with the savory broth. If it is difficult to find, leave it out rather than substituting a large amount of a strongly flavored herb. The sesame and scallions in the base recipe are enough to make a complete, balanced garnish.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking in a covered, shallow container, with the eggplant stored in its broth. Properly refrigerated, the dish keeps for 3 to 4 days. The eggplant will soften further as it sits, and the broth may taste more pronounced the next day, so taste before adding any extra seasoning. Do not leave cooked eggplant at room temperature for more than 2 hours.

For best texture, reheat only the amount you plan to serve. Put the eggplant and broth in a small covered saucepan and warm over low heat until steaming, turning the pieces gently once. Add a tablespoon or two of water if the broth has become very concentrated. You can also microwave a portion in a covered microwave-safe dish, stirring or turning it halfway through. Reheat leftovers to 165°F (74°C), as recommended by USDA FSIS, and avoid repeated cycles of cooling and reheating because the tender pieces can break down.

Freezing is possible, but it changes the texture: thawed eggplant is often softer and more fragile than freshly cooked eggplant. If you do freeze it, pack the eggplant with its broth in a freezer-safe container, leave a little room for expansion, and use it within about 2 months for better quality. Thaw overnight in the refrigerator and warm gently. For a meal where the eggplant’s shape matters, refrigeration rather than freezing is the better choice.

Frequently Asked Questions

Can I make Japanese stewed eggplant without dashi?

Yes. If you do not have dashi, use 1½ cups (360 ml) water with a small amount of instant vegetarian stock, following its package directions. The flavor will be less traditionally Japanese and less savory than a broth made with kombu or bonito dashi, but ginger, soy sauce, and mirin still make a well-seasoned simmering liquid. Keep in mind that ordinary vegetable stock can be more strongly flavored, so taste the broth before adding extra soy sauce.

Do I need to peel Japanese eggplant?

No. Japanese eggplant has relatively thin skin, and leaving it on helps each piece keep its shape while simmering. The shallow scoring lets the seasoned liquid reach the surface without removing the skin. If the eggplant is unusually large or has tough skin, you can peel a few narrow strips lengthwise, leaving alternating bands of skin and flesh, but peeling is not required for this recipe.

Why did my eggplant turn mushy?

Eggplant becomes very soft if it is cut into small pieces, boiled vigorously, or simmered much longer than needed. Cut the pieces about 2 inches (5 cm) long, keep the broth at a gentle bubble, and begin checking tenderness at 11 minutes. Some eggplants are more mature or larger than others, so use a thin knife as the guide rather than relying only on the clock. Handle tender pieces gently when serving.

Can I make this recipe ahead?

Yes. You can cook the dish several hours ahead, let it rest in the broth, and serve it at room temperature, or refrigerate it and reheat it gently later. For the best texture, prepare it no more than a day ahead when possible; the eggplant continues to soften as it sits. Add the sesame seeds and sliced scallions just before serving so the garnishes remain fresh and distinct.

What can I use instead of mirin?

Use 1 tablespoon (15 ml) sake and 1 teaspoon (4 g) sugar for each 2 tablespoons (30 ml) of mirin in this recipe. The listed recipe uses 2 tablespoons of mirin, so the full substitution is 2 tablespoons (30 ml) sake plus 2 teaspoons (8 g) sugar. This makes the broth less mellow and slightly different in sweetness, but it works well. If you do not have sake, use water with the sugar; the finished broth will have less depth.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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