One Pan Cod Recipes: A Lemon-Garlic Dinner with Potatoes

This one-pan cod dinner pairs flaky white fish with golden baby potatoes, green beans, and juicy tomatoes, all roasted on a sheet pan with lemon and garlic. The vegetables cook in stages so the potatoes have time to soften while the cod stays moist, and the finished meal needs little more than a serving platter or a few wedges of lemon.

Ingredients

1½ lb baby potatoes (680 g), halved or quartered so the pieces are about 1 inch (2.5 cm)
3 tbsp olive oil (45 ml), divided
¾ tsp fine salt (4 g), divided, plus more to taste
½ tsp freshly ground black pepper (1 g), divided
1 lb green beans (450 g), trimmed
1 pint cherry tomatoes (about 2 cups / 300 g)
4 cod fillets, about 6 oz (170 g) each and 1 inch (2.5 cm) thick
2 garlic cloves (about 6 g), finely grated or minced
1 tsp finely grated lemon zest (about 2 g)
1 tbsp fresh lemon juice (15 ml), plus lemon wedges for serving
½ tsp sweet paprika (1 g)
1 tbsp chopped fresh parsley (4 g), optional

Instructions

Heat the oven to 425°F (220°C). Line a large rimmed baking sheet, about 13 by 18 inches (33 by 46 cm), with parchment if you want easier cleanup. Cut the potatoes into even pieces; smaller, evenly sized pieces roast more reliably than large uneven chunks.
Put the potatoes on the pan and toss them with 1½ tablespoons (22 ml) of the olive oil, ½ teaspoon (3 g) of the salt, and ¼ teaspoon (0.5 g) of the pepper. Spread them cut-side down in a single layer, leaving room for the other ingredients. Roast for 20 minutes, until their edges are beginning to brown and a knife meets some resistance in the centers.
While the potatoes roast, pat the cod dry with paper towels. In a small bowl, stir together the remaining 1½ tablespoons (22 ml) olive oil, garlic, lemon zest, lemon juice, paprika, remaining ¼ teaspoon (1 g) salt, and remaining ¼ teaspoon (0.5 g) pepper. Coat the fish on both sides with this mixture and keep it refrigerated while you prepare the vegetables if the potatoes need more time.
Take the pan out of the oven and turn the potatoes. Add the green beans and tomatoes, tossing them on the pan with any oil left there. Arrange the vegetables in an even layer and roast for 5 minutes. This short head start helps the beans cook through without leaving the cod in the oven too long.
Move the vegetables toward the edges of the pan and set the cod in the center, with a little space between fillets. Spoon any garlic-lemon mixture left in the bowl over the fish. Roast for 15 minutes, checking the thickest part of a fillet with a food thermometer near the end. Fish is safe at 145°F (63°C), the USDA FSIS safe minimum internal temperature; the flesh should also look opaque and separate into flakes. If a thick fillet has not reached that temperature, return the pan to the oven for 2 minutes at a time and check again.
Scatter parsley over the pan, if using, and serve while hot with lemon wedges. Spoon the tomato juices and any pan juices over the cod and vegetables. Use a thin spatula to lift each fillet carefully, since cooked cod can break into flakes.

Tips

Choose evenly sized fillets. Cod pieces close to 1 inch (2.5 cm) thick are easiest to time. If some pieces are noticeably thinner, add those to the pan a few minutes later or remove them as soon as they reach 145°F (63°C). Thickness, not just weight, affects how quickly fish cooks.
Dry the fish before seasoning. A quick pat with paper towels removes surface moisture so the lemon-garlic oil clings better. Keep raw fish and its juices away from ready-to-eat foods, wash your hands and utensils after handling it, and refrigerate it until it goes onto the pan.
Give the vegetables room. Crowding traps steam and can leave potatoes pale and beans limp. Use a large rimmed pan; if your pan is smaller, roast the potatoes and vegetables in a second pan rather than piling everything up. A little space around the pieces helps them brown.
Adjust salt for your ingredients. The recipe uses fine salt and unsalted oil. If using coarse kosher salt, season gradually and taste the vegetables after roasting; salt crystals vary in size, so the same spoonful can taste quite different. Lemon wedges make it easy for everyone to add more brightness at the table.

Serving Suggestions

This pan already has fish and vegetables, so it can be served as a complete dinner. For a heartier meal, add crusty bread to catch the lemony tomato juices, or serve it with cooked rice, couscous, or orzo. If using a grain, prepare it while the potatoes roast so it is ready when the cod comes out of the oven.

A crisp green salad with a simple vinaigrette is a good contrast to the warm potatoes. You can also put out extra lemon wedges and a small bowl of chopped parsley. If you want a sauce, serve plain yogurt mixed with a little lemon juice, chopped dill, and black pepper on the side; keep it separate from the hot pan so it stays cool and fresh-tasting.

Variations

Swap the vegetables: Broccoli florets, asparagus pieces, or sliced zucchini can stand in for the green beans. Cut them into bite-size pieces and add them with the tomatoes, checking for tenderness as they roast. Broccoli may need the full 15 minutes with the fish, while thin asparagus can cook quickly; add it later if you prefer it crisp-tender.

Use another white fish: Haddock, pollock, or hake can replace cod in equal-sized fillets. The flavor and texture will differ slightly, but the same seasoning works. Check each piece with a thermometer rather than relying only on the clock, since fillets vary in thickness. For a richer fish such as salmon, the flavor will be different and its cooking time may change.

Change the seasoning: Replace the paprika with ½ teaspoon dried oregano (about 0.5 g) for a Mediterranean-leaning profile, or add a pinch of red pepper flakes for gentle heat. A few pitted olives scattered over the pan during the last 5 minutes add a salty, briny note. If using olives or another salty addition, reduce the added salt slightly.

Make it dairy-free and gluten-free: The recipe as written contains neither butter nor wheat, so no special substitution is needed for those ingredients. Check packaged seasonings or any prepared side dish if serving someone who avoids gluten. For a buttery finish, a small knob of butter can be stirred into the pan juices at the table, but it is optional.

Storage and Reheating

Refrigerate leftovers within 2 hours of cooking, dividing them into shallow airtight containers so they cool promptly. Store the cod and vegetables together or separately for 3–4 days in the refrigerator. For best texture, keep any bread, grains, salad, or yogurt sauce in separate containers. Do not leave cooked fish at room temperature for more than 2 hours, or 1 hour if the surrounding temperature is above 90°F (32°C).

Reheat only the portion you plan to eat. Put the fish and vegetables in a covered oven-safe dish with a teaspoon of water or a small drizzle of oil, then warm at 300°F (150°C) until heated through. Check leftovers with a food thermometer: USDA FSIS recommends reheating leftovers to 165°F (74°C). The fish may become firmer at that temperature, so gentle reheating and a cover help limit drying. A microwave also works: use a covered microwave-safe dish, heat in short bursts, and check more than one spot. Freeze leftovers in a freezer-safe container for up to 2 months for better quality; thaw overnight in the refrigerator and reheat to 165°F (74°C).

Frequently Asked Questions

Can I use frozen cod?

Yes, but thaw it completely in the refrigerator before cooking, then pat it very dry. Frozen fillets can release extra water as they cook, which may make the vegetables steam instead of roast. If the fish is vacuum-packed, follow the package directions for thawing and remove it from the packaging as directed. Avoid leaving fish to thaw on the counter.

Can I cook the cod from frozen on the same pan?

It is better to thaw it first for this recipe. The potatoes and vegetables have a fixed roasting schedule, while frozen cod takes longer and releases water; adding it frozen can leave the vegetables overcooked before the fish is done. If you must cook cod from frozen, follow safe package instructions and cook it separately until its thickest part reaches 145°F (63°C).

How can I tell when cod is done without cutting it open?

The most reliable check is a food thermometer inserted sideways into the thickest part of the fillet. It should read 145°F (63°C). The fish will look opaque and should flake with gentle pressure, but visual cues alone can be misleading, especially with thick pieces or bright oven lighting.

What if I do not have a large sheet pan?

Use two smaller rimmed baking sheets and divide the potatoes and vegetables between them so they are not crowded. Add the cod to one pan, or split the fillets between both pans. Rotate the pans between oven racks when you add the fish if your oven browns unevenly. Avoid using a shallow tray that could spill hot oil or tomato juices.

Can I prepare any part ahead?

You can trim the green beans, wash and cut the potatoes, and mix the lemon-garlic seasoning several hours ahead. Keep the cut potatoes covered in cold water in the refrigerator to prevent browning, then drain and dry them thoroughly before tossing with oil. Keep raw cod refrigerated and season it shortly before baking so the lemon juice does not sit on the fish for an extended time.

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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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