Ingredients
The following ingredients have 40 Servings
- 2 tablespoons salted butter
- 2 large yellow onions, sliced crosswise into 1/8-inch-thick rings
- 1 tablespoon fresh thyme leaves
- 1 teaspoon kosher salt
- 6 tablespoons fresh apple cider, divided
- 1 sheet good-quality store-bought puff pastry, such as Dufour brand, kept cold
- 1 medium firm-tart apple, unpeeled, cored and cut into thin slices
- 3 cups finely grated sharp Cheddar cheese
