How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Whitefish And Vegetable Gratin?

You need 11 ingredients. The key ingredients include: 1 large yellow onion, sliced and separated into rings, 1 1/2 lbs white fish fillets (snapper, cod, or sole), 1/4 - 1/2 teaspoon dried basil, salt, and more.

Is Whitefish And Vegetable Gratin suitable as seafood?

Yes, Whitefish And Vegetable Gratin falls under the Seafood category and is a great choice for this type of meal.

How do I store leftover Whitefish And Vegetable Gratin?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Whitefish And Vegetable Gratin Recipe

Name: Whitefish And Vegetable Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 large yellow onion, sliced and separated into rings; 1 1/2 lbs white fish fillets (snapper, cod, or sole); 1/4 - 1/2 teaspoon dried basil; salt; fresh ground black pepper; 3 ounces mushrooms, sliced; 1 tomatoes, sliced; 1/3 cup dry white wine; 3/4 cup dried breadcrumbs; 1/4 cup butter, melted; 1/4 cup freshly grated parmesan cheese

Try this homemade Whitefish And Vegetable Gratin recipe the whole family will love. Made with yellow onion, white fish, basil and salt. Easy step-by-ste…

This Whitefish And Vegetable Gratin relies on simple, everyday ingredients such as dried basil, salt, fresh ground black pepper and mushrooms, sliced. It comes together quickly and makes 4 servings, at about 216 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Seafood

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

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Whitefish And Vegetable Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

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