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Cheese & DairyIntermediate15 min
Pi Crostini: Caramelized Onion & Gruyère Circles
The perfect marriage of a savory French onion pie and a crisp crostini, this appetizer is a sophisticated nod to the mathematical constant. Sweet, slow-cooked caramelized onions are piled high on a toasted baguette slice, topped with nutty Gruyère cheese, and baked until bubbly and golden. The resulting bite is a harmonious blend of sweet, savory, and crunchy textures.
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Ingredients
- •baguette, cut into 1/2-inch thick slices
- •tablespoons olive oil, divided
- •large yellow onions, thinly sliced
- •1/2 teaspoon salt
- •1/4 teaspoon black pepper
- •oz Gruyère cheese, shredded
- •tablespoon fresh thyme leaves
Prep Steps
- 1In a large skillet, heat 1 tablespoon of olive oil over medium
- 2low heat. Add the sliced onions and salt, stirring occasionally. Cook for 30 minutes
- 3minutes until the onions are deeply golden brown and caramelized, then stir in the pepper and thyme.
- 4Preheat oven to 375°F (190°C). Brush both sides of the baguette slices with the remaining 1 tablespoon of olive oil and arrange them on a baking sheet. Toast for 5 minutes
- 5minutes until lightly golden and crisp.
- 6Spoon a generous amount of the caramelized onions onto each crostini, spreading them evenly. Top each with a pinch of shredded Gruyère cheese.
- 7Return the crostini to the oven and bake for 5 minutes
- 8minutes, or until the cheese is melted and bubbly. Serve immediately.
Chef's Tip & Pairing
The key to perfect caramelized onions is patience; do not rush the process, as the deep browning is what develops the complex, sweet flavor. Pair this rich, savory bite with a crisp, dry white wine like a Sancerre or a light-bodied, earthy Pinot Noir.
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