Creating beef sausage and egg puff pastry is an art that combines technique with creativity. Follow these detailed instructions to ensure your pastries turn out perfectly every time.

Preparing the Filling

1. Cook the Sausages: In a large skillet over medium heat, add 1 tablespoon of butter. Once melted, add the chopped onion and garlic, sautéing until translucent. Add the beef sausage meat, breaking it up with a spatula, and cook until browned. Drain excess fat if necessary.
2. Scramble the Eggs: In a bowl, whisk together the 4 eggs, salt, pepper, and milk. Pour the egg mixture into the skillet with the sausage and cook, stirring constantly, until the eggs are just set but still soft. Remove from heat and let it cool slightly.
3. Mix Ingredients: Once cooled, stir in the grated cheddar cheese until well combined.

Assembling the Pastry

4. Prepare the Pastry: Preheat your oven to 400°F (200°C). Roll out the puff pastry sheets on a lightly floured surface until they are about 1/8 inch thick. Cut each sheet into 6 equal squares.
5. Fill the Pastry: Spoon a generous amount of the sausage and egg mixture into the center of each pastry square.
6. Seal the Pastry: Fold each square into a triangle, enclosing the filling. Press the edges together with a fork to seal. Make a small slit on top of each pastry to allow steam to escape.
7. Egg Wash: Beat the remaining egg in a small bowl and brush it over the top of each pastry for a golden finish.

Baking

8. Bake: Place the pastries on a baking sheet lined with parchment paper and bake in the preheated oven for 15-20 minutes or until golden brown and puffed.
9. Cool: Remove from the oven and allow to cool on a wire rack for a few minutes before serving.