Three Onion Casserole Recipe

Name: Three Onion Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 3 tablespoons butter, unsalted; 2 large yellow onions, thinly sliced; 2 large red onions, thinly sliced; 4 medium leeks, well rinsed, dried and thinly sliced; 1/2 teaspoon salt; ground pepper, to taste; 1 1/2 cups havarti cheese, grated; 2 (5 ounce) packages spreadable cheese with garlic and herbs; 1 1/2 cups gruyere, grated; 1/2 cup dry white wine

Servings: persons

1
Preheat oven to 350u00b0F
2
Butter an 8 cup baking dish with 1 tablespoon of butter.
3
Make a layer in the baking dish, using a third each of the yellow onions, red onions and leeks.
4
Sprinkle the layer sparingly with salt and pepper and top with the Havarti.
5
Make another layer of the onions and leeks. Add a little more pepper.
6
Top this layer with the Boursin.
7
Layer the remaining onions and leeks and top with the Gruyere.
8
Dot the top with the remaining 2
9
tablespoons butter.
10
Pour the wine over all.
11
Bake for 1 hour.
12
Cover the top with aluminum foil,
13
if it gets too brown.
14
Serve immediately.

487

kcal

Calories

Fat

Carbs

Protein

Fat Carbs Protein

* Per serving · 4 servings · Values may vary.

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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How did you like this recipe?

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

You need 10 ingredients. The key ingredients include: 3 tablespoons butter, unsalted, 2 large yellow onions, thinly sliced, 2 large red onions, thinly sliced, 4 medium leeks, well rinsed, dried and thinly sliced, and more.

Yes, Three Onion Casserole falls under the General category and is a great choice for this type of meal.

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

That's it — enjoy your meal!

Three Onion Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions