Ingredients
Scale
- 4 large potatoes, sliced
- 2 large onions, thinly sliced
- 2 cups shredded cheddar cheese
- 1 cup grated Gruyere cheese
- 3 tablespoons butter
- 1/2 cup milk
- 2 tablespoons olive oil
- Salt and pepper to taste
- Fresh thyme for garnish
Instructions
- Preheat oven to 375°F (190°C). Grease a baking dish.
- Heat olive oil and 1 tablespoon butter in a skillet over medium heat. Add onions and cook until caramelized, about 20 minutes. Season with salt and pepper.
- Meanwhile, boil potatoes in salted water until tender, about 10 minutes. Drain and set aside.
- Layer potatoes and caramelized onions in the dish, topping each layer with cheese.
- Mix milk with remaining butter, pour over the casserole. Cover with foil.
- Bake for 25 minutes, then remove foil and broil for 5 minutes until bubbly and golden.
- Garnish with fresh thyme and serve hot.
Notes
- Feel free to add sautéed mushrooms or bacon bits for extra flavor.
- Use a mix of cheeses for a richer taste.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Method: Baking, sautéing
- Cuisine: French-inspired
- Diet: Vegetarian
Nutrition
- Serving Size: 1 slice
- Calories: 320 Kcal
- Sugar: 5g
- Sodium: 520mg
- Fat: 18g
- Saturated Fat: 10g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 35g
- Fiber: 4g
- Protein: 12g
- Cholesterol: 45mg