Caramelized Onion Crostini Appetizer
It's like picking up a piece of French onion soup with your hands! Caramelized Onion Crostini Appetizers are topped with caramelized onions and Gruyere cheese for an indulgent appetizer.
Ingredients
- 1 tablespoon olive oil
- 2 tablespoons butter
- 4 ½ cups yellow onions (about 3–4 onions)
- ½ teaspoon salt
- pinch sugar
- 2 tablespoons cognac
- 1 cup beef broth
- pepper
- baguette (sliced inot ½ inch slices)
- 8 ounces gruyere (2 cups)
Instructions
- Add butter and olive oil to a large skillet with a lid and cook over medium heat. Toss onions and cover for 15 minutes. Remove the lid, stir in salt and sugar and cook an additional 15 minutes until golden brown. Pour in cognac and beef broth and turn heat up. Simmer until it has reduced, about 15 minutes. Adjust salt if needed and add pepper.
- Preheat oven to 375º. Line a baking sheet with Parchment paper.
- Add a large spoonful of onions onto each bread slice and top with cheese. Bake for 15 minutes or until the cheese has started to brown.
Barbara's Notes + Tips
- You can make the onions in advance and refrigerate until needed.
- You can use any type of brandy.
- If making vegetarian, substitute vegetable broth for beef broth.
- Assemble these a day in advance and then bake before serving.
- They taste best warm but are still delicious at room temperature.
Nutrition
Serving: 1g | Calories: 96kcal | Carbohydrates: 8g | Protein: 4g | Fat: 5g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 1g | Cholesterol: 13mg | Sodium: 191mg | Potassium: 69mg | Fiber: 1g | Sugar: 1g | Vitamin A: 120IU | Vitamin C: 2mg | Calcium: 112mg | Iron: 1mg
