Zucchini with Soy Sauce: Easy 15-Minute Side Dish

Zucchini with soy sauce is a quick, savory side dish where tender zucchini slices are quickly cooked and coated in a glossy, umami-rich sauce. It’s a versatile recipe that works as a simple weeknight vegetable side, a topping for rice or noodles, or even a warm salad. The high heat keeps the zucchini from turning mushy, while the soy sauce mixture caramelizes slightly for a deeply flavorful finish.

Ingredients

4 medium zucchini (about 1.5 lb / 680 g)
2 tablespoons (30 ml) soy sauce (use tamari or coconut aminos for gluten-free)
1 tablespoon (15 ml) oyster sauce (optional; adds depth)
1 teaspoon (5 ml) toasted sesame oil
1 tablespoon (15 ml) neutral oil (like canola or grapeseed)
2 cloves garlic, minced
1 teaspoon (5 g) grated fresh ginger (optional)
1 teaspoon (5 g) sugar (or honey)
1 tablespoon (15 ml) water
1 tablespoon (8 g) sesame seeds, for garnish
2 green onions, thinly sliced, for garnish

Instructions

Wash the zucchini and trim the ends. Cut them into 1/4-inch (6 mm) thick rounds, or into half-moons if you prefer. If the zucchini are very large, you can quarter them lengthwise first.
In a small bowl, whisk together the soy sauce, oyster sauce (if using), sesame oil, sugar, and water. Set aside.
Heat a large skillet or wok over high heat. Add the neutral oil and swirl to coat. When the oil is shimmering (but not smoking), add the zucchini in a single layer (work in batches if needed to avoid crowding). Let them cook undisturbed for 2-3 minutes until they start to brown on the bottom.
Add the garlic and ginger (if using) and toss everything together. Cook for another 2-3 minutes, stirring occasionally, until the zucchini is just tender-crisp (you should be able to pierce it with a fork, but it should still hold its shape).
Pour the sauce over the zucchini. Stir and cook for 1-2 minutes, until the sauce thickens slightly and coats the zucchini evenly. The zucchini should be fully cooked but not mushy.
Remove from heat. Sprinkle with sesame seeds and green onions. Serve hot, warm, or at room temperature.

Tips

Don’t crowd the pan: If you add too many zucchini at once, they will steam instead of sear, making them watery. Cook in batches if your skillet isn’t large enough.
Adjust salt: Soy sauce varies in saltiness. If you’re using a low-sodium version, you might want to add a pinch of salt. If using regular soy sauce, taste before adding extra salt.
Make it gluten-free: Use tamari or coconut aminos instead of soy sauce. Omit the oyster sauce or use a gluten-free version.
Don’t overcook: Zucchini cooks fast. Keep the heat high and the total cooking time short to maintain a little crunch. Overcooked zucchini becomes limp and watery.

Serving Suggestions

Serve this zucchini as a side dish alongside grilled chicken, salmon, or steak. It also makes a great topping for rice bowls, quinoa, or noodles. For a light meal, toss it with cooked soba noodles and a little extra sesame oil. It can also be served cold as a salad the next day.

Variations

Spicy: Add 1/2 teaspoon red pepper flakes or a drizzle of sriracha with the garlic.
Garlicky: Double the garlic for a more pungent flavor.
With mushrooms: Add 1 cup (100 g) sliced mushrooms (shiitake or cremini) along with the zucchini for an earthy twist.
With bell pepper: Add 1/2 cup (75 g) sliced bell pepper for extra color and crunch.
Honey-ginger: Replace the sugar with honey and add an extra teaspoon of grated ginger.

Storage and Reheating

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in a hot skillet over medium-high heat for 1-2 minutes, or in the microwave in 30-second bursts. The zucchini will soften more upon reheating, so it’s best to enjoy it fresh. You can also eat it cold straight from the fridge.

Frequently Asked Questions

Can I use yellow squash instead of zucchini? Yes, yellow squash works perfectly. It has a slightly different flavor but the same texture and cooking time.

Do I need to peel the zucchini? No, the skin is edible and adds color and nutrients. Just wash it well.

Can I make this ahead of time? You can cook the zucchini and store it in the fridge for up to 3 days. However, it’s best served fresh as it will soften and release more water upon reheating.

What if I don’t have oyster sauce? You can omit it or substitute with hoisin sauce, but the flavor will be slightly different. Alternatively, add an extra teaspoon of sugar and a splash of rice vinegar to mimic the sweet-savory balance.

Is this dish vegan? Yes, if you use a vegan oyster sauce substitute (or omit it) and use sugar instead of honey. Many oyster sauces contain oyster extract, so check the label if you’re vegan.

Can I grill the zucchini instead? Absolutely. Grill the zucchini slices for 2-3 minutes per side, then brush with the sauce during the last minute of grilling. This adds a nice smoky flavor.

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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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