Creating these delightful Puff Pastry Breakfast Cups is straightforward. Just follow these steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C) and grease a muffin tin with cooking spray or butter.
2. Roll Out the Pastry: Unroll the thawed puff pastry on a clean, lightly floured surface. Cut out circles that will fit into the muffin tin cups.
3. Shape the Cups: Gently press the pastry circles into the muffin tins, making sure they cover the bottom and sides.
4. Prepare the Filling: In a bowl, whisk together the eggs, salt, and pepper. If using onions or other veggies, sauté them in olive oil until softened.
5. Add Fillings: Layer the bottom of each pastry cup with your choice of cheese, followed by any meat, sautéed veggies, and finally the egg mixture on top.
6. Top with Cheese: Sprinkle extra cheese on top of the egg mixture for added flavor.
7. Bake: Place the muffin tin in the preheated oven and bake for 15-20 minutes, or until the egg is set and the pastry is golden brown.
8. Cool Slightly: Let the cups cool in the tin for a few minutes before carefully removing them.
9. Serve Warm: Enjoy your Puff Pastry Breakfast Cups warm, or let them cool completely for later consumption.

With these simple instructions, you will create incredible pastries that are perfect for breakfast or brunch!