Cod with Potatoes, Onions, and Tomatoes
A hearty one-pan meal of flaky cod, tender potatoes, sweet onions, and juicy tomatoes, all simmered in olive oil with a hint of rosemary. Simple, rustic, and satisfying.
- Total time
- 45 min
- Servings
- 4
- Calories
- 420
- Protein
- 35g

Ingredients
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Open the appInstructions
Step 1
Preheat oven to 400°F. Slice 1.5 lb potatoes into 1/4-inch rounds and 2 onions into thin half-moons.
Step 2
In a large oven-safe skillet, heat 2 tbsp olive oil over medium. Add onions and cook until soft and golden, about 8 minutes.
Step 3
Add potatoes and 1/2 tsp salt, toss to coat. Pour in 1/4 cup water, cover, and cook until potatoes are just tender, about 10 minutes.
Step 4
Slice 3 tomatoes into rounds. Arrange them over the potatoes, then lay 1.5 lb cod fillets on top.
Step 5
Drizzle with remaining 2 tbsp olive oil, sprinkle with 1/2 tsp salt and 1/2 tsp pepper, and lay 2 rosemary sprigs over the fish.
Step 6
Bake uncovered until fish flakes easily and potatoes are fully tender, about 15-20 minutes. Let rest 5 minutes before serving.
Step 7
Serve hot, spooning pan juices over each portion.
Tools you’ll need
- Large oven-safe skillet
- Chef's knife
- Cutting board
- Measuring spoons
- Measuring cup
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