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 Potato, Onion, And Tomato Gratin?

You need 7 ingredients. The key ingredients include: 3 lbs baking potatoes, peeled and thinly sliced, 3 large yellow onions, thinly sliced, 2 lbs tomatoes, thinly sliced, sea salt, to taste, and more.

Is Potato, Onion, And Tomato Gratin suitable as general?

Yes, Potato, Onion, And Tomato Gratin falls under the General category and is a great choice for this type of meal.

How do I store leftover Potato, Onion, And Tomato Gratin?

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

Potato, Onion, And Tomato Gratin Recipe

Name: Potato, Onion, And Tomato Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 3 lbs baking potatoes, peeled and thinly sliced; 3 large yellow onions, thinly sliced; 2 lbs tomatoes, thinly sliced; sea salt, to taste; freshly ground pepper, to taste; 1/2 cup olive oil; 1 cup parmesan cheese, freshly grated

Try this homemade Potato, Onion, And Tomato Gratin recipe the whole family will love. Made with baking potatoes, yellow onions, tomatoes and salt. Easy …

This Potato, Onion, And Tomato Gratin relies on simple, everyday ingredients such as tomatoes, thinly sliced, sea salt, to taste and olive oil. It comes together quickly and makes 4 servings, at about 706 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 General

Servings: persons

3 lbs baking potatoes, peeled and thinly sliced
3 large yellow onions, thinly sliced
2 lbs tomatoes, thinly sliced
sea salt, to taste
freshly ground pepper, to taste
1/2 cup olive oil
1 cup parmesan cheese, freshly grated

Frequently Asked Questions

Quick Info

Servings
4 servings
Calories
706 kcal
Category
General

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