text: Caramelized Onion and Apple Tarts with Gruyere and Thyme Recipe. Simple, pretty and delicious, with caramelized onions, apples and grated Gruyère cheese atop store-bought puff pastry. Elegant Appetizers, Appetizers For Party, Appetizer Recipes, Thanksgiving Appetizers, Appetizer Ideas, Thanksgiving Menu, Yummy Appetizers, Thyme Recipes, Brunch