Ingredients
Scale
- 4 large yellow onions, sliced
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 4 cups beef broth
- 1 teaspoon thyme
- Salt and pepper to taste
- 1 baguette, sliced
- 1 cup grated Gruyere cheese
Instructions
- Heat butter and olive oil in a large pot over medium heat.
- Add sliced onions and cook, stirring occasionally, until deeply caramelized, about 30 minutes.
- Stir in thyme, salt, and pepper.
- Pour in beef broth and simmer for 15 minutes.
- Preheat oven to 400°F (200°C).
- Toast baguette slices until golden.
- Ladle soup into oven-safe bowls, top with toasted bread and grated cheese.
- Broil until cheese is bubbly and browned, about 3-5 minutes.
Notes
- Use a mix of yellow and sweet onions for sweeter flavor.
- Monitor caramelization to avoid burning.
- Oven-safe bowls are ideal for broiling cheese topping.
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Method: Sauté, simmer, broil
- Cuisine: French
- Diet: Vegetarian
Nutrition
- Serving Size: 1 bowl
- Calories: 460 Kcal
- Sugar: 14g
- Sodium: 1200mg
- Fat: 18g
- Saturated Fat: 9g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 65g
- Fiber: 4g
- Protein: 21g
- Cholesterol: 45mg