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 Hachis Parmentier (Mashed Potato Casserole)?

You need 12 ingredients. The key ingredients include: 2 onions, chopped, 3 garlic cloves, minced (or pressed), 1 tablespoon butter, 2 tablespoons olive oil, and more.

Is Hachis Parmentier (Mashed Potato Casserole) suitable as meat & poultry?

Yes, Hachis Parmentier (Mashed Potato Casserole) falls under the Meat & Poultry category and is a great choice for this type of meal.

How do I store leftover Hachis Parmentier (Mashed Potato Casserole)?

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

Hachis Parmentier (Mashed Potato Casserole) Recipe

Name: Hachis Parmentier (Mashed Potato Casserole)
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 onions, chopped; 3 garlic cloves, minced (or pressed); 1 tablespoon butter; 2 tablespoons olive oil; 3 tomatoes, chopped; 1 1/2 lbs lean ground beef; 1 tablespoon herbes de provence (or other herbs to your taste); salt & pepper, to taste; 1 egg yolk; 2 tablespoons parmesan cheese; 4 -5 cups mashed potatoes (instant is fine); 3/4 cup gruyere cheese, grated (can also use emmental or similar)

Try this homemade Hachis Parmentier (Mashed Potato Casserole) recipe the whole family will love. Made with onions, garlic, butter and olive oil. Easy st…

This Hachis Parmentier (Mashed Potato Casserole) relies on simple, everyday ingredients such as onions, chopped, butter, olive oil and tomatoes, chopped. It comes together quickly and makes 4 servings, at about 899 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 Meat & Poultry

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.

My Personal Notes

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Hachis Parmentier (Mashed Potato Casserole)

Tips for the best results

Variations & substitutions

My Personal Notes

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