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Lemon-Herb White Fish with Potatoes and Green Beans

A one-pan dinner pairs flaky white fish with potatoes and green beans, with a thermometer check for food safety.

Published 10/6/2026

General health education, not personal medical advice. Ask a qualified health professional before changing your care. Read our editorial standards.
In this article

Makes 4 servings

This flexible sheet-pan meal uses a mild white fish such as cod, haddock, or pollock. Cooking times depend on the thickness of the fillets and the size of the potato pieces, so use the temperature check rather than relying only on the clock.

Ingredients

  • 1 1/2 pounds small potatoes, cut into bite-size pieces
  • 2 tablespoons olive oil, divided
  • 1 pound green beans, trimmed
  • 4 fish fillets, about 4 to 6 ounces each
  • 1 lemon, zest and juice
  • 1 teaspoon dried oregano or thyme
  • 1 small garlic clove, finely grated, optional
  • Black pepper and chopped parsley, to taste

Method

1. Heat the oven to 425 F. Toss potatoes with half the oil and pepper. Spread on a rimmed baking sheet and roast for about 20 minutes, turning once.

2. Mix the remaining oil with lemon zest, a squeeze of juice, herbs, and garlic if using.

3. Move the potatoes to the sides of the pan. Add green beans and toss them with a little of the seasoned oil. Place fish in the center and brush with the remaining mixture.

4. Roast until the potatoes are tender and the thickest part of each fillet reaches 145 F on a food thermometer. Fish should also look opaque and separate easily with a fork, but appearance alone is not the most reliable temperature check.

5. Finish with lemon juice and parsley. Serve promptly.

Swaps and food safety

Use carrots or broccoli instead of green beans, adjusting their size so they cook through. Keep raw fish and its juices away from ready-to-eat foods. Wash hands, utensils, and surfaces after handling raw seafood. Refrigerate leftovers promptly and reheat them thoroughly. Check labels for allergens and choose a different recipe if fish is not appropriate for your household.

This recipe is not a therapeutic diet. Anyone with a medical condition, food allergy, or pregnancy-related food-safety question should ask a qualified health professional for advice tailored to them.

Sources and further reading

Health disclaimer

This article is for general education only. Its information and suggestions are not medical advice, diagnosis, or treatment and may not be right for everyone. Ask a qualified health professional for advice that fits your health, medications, and needs before changing your diet, exercise, supplement use, or care.

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