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Swiss Cheese Onion Crostini

Serves 8
Time 40 min
These irresistible appetizers combine everything you love about French onion soup in a portable two-bite serving.
Special Diets:
Ingredients
  • 2 tablespoons extra-virgin olive oil
  • 2 yellow or white onions, very thinly sliced (about 3 cups)
  • 1 teaspoon dried thyme
  • 1/4 teaspoon fine sea salt
  • 1 large baguette, sliced on the diagonal into 12-16 slices, about 1/2-inch thick
  • 2 tablespoons Dijon mustard
  • 2 cups grated Gruyère cheese
  • 1/4 teaspoon ground black pepper
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Method

Preheat the oven to 425°F.

In a large skillet, heat oil over medium-high heat; add onions. 

Cook at least 3 minutes before stirring (onions should start to brown before you move them around). 

Continue to cook, stirring only occasionally, until onions are soft and well browned, about 20 minutes. 

Add thyme and season with salt and pepper. 

Spread bread slices with a little mustard. 

Divide onion mixture evenly over bread slices then top each with cheese. 

Place on a foil-lined baking sheet; bake 10 minutes or until cheese is melted.

Note: We've provided special diet and nutritional information for educational purposes. But remember - we're cooks, not doctors! You should follow the advice of your health-care provider. And since product formulations change, check product labels for the most recent ingredient information.
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  • 2 tablespoons extra-virgin olive oil
  • 2 yellow or white onions, very thinly sliced (about 3 cups)
  • 1 teaspoon dried thyme
  • 1/4 teaspoon fine sea salt
  • 1 large baguette, sliced on the diagonal into 12-16 slices, about 1/2-inch thick
  • 2 tablespoons Dijon mustard
  • 2 cups grated Gruyère cheese
  • 1/4 teaspoon ground black pepper
Shop with Prime

Exclusively for Prime members in select ZIP codes.