Preheat your oven to 375°F (190°C). Prepare your muffin tin with non-stick spray or butter.

Roll out the thawed puff pastry on a lightly floured surface until it's about 1/8 inch thick. Cut out circles that will fit into your muffin tin cups.

Place each pastry circle into the muffin tin, pressing gently to form a shell. Check for tears and patch them if needed.

In a mixing bowl, combine the sausage meat, 3 beaten eggs, cheddar cheese, and a sprinkle of salt and pepper. Blend until well combined.

Spoon the sausage mixture into each prepared pastry cup, filling them about three-quarters full.

Brush the edges of the pastry with the remaining beaten egg for a golden finish.

Bake in the preheated oven for 25-30 minutes until puffed and golden brown. The filling should be fully set.

Allow the pies to cool for about 5 minutes, then lift them out and serve warm.