Step 1

Heat a medium skillet over medium heat. Add the bacon, onion and celery, and cook for 4 minutes, until slightly softened. Add the garlic and cook 1 more minute. Remove from the heat and transfer the bacon mixture to a plate. Let cool for 10 minutes.

Step 2

In a large bowl, combine the sausage, parsley, panko, 1 egg, salt, pepper and cooled bacon mixture. Mix well to combine. Cover and refrigerate until ready to use.

Step 3

Meanwhile, open the puff pastry sheets on a very lightly floured cutting board (you should have 2 sheets, measuring 10-inches by 10-inches). Cut each in half to make 4 rectangles, 5-inches by 10-inches each. Lay each rectangle so that the long side faces you.

Step 4

Remove the sausage mixture from the refrigerator and divide it into 4 portions. Form each portion into the shape of a long log, about 1-inch thick, and place one lengthwise in the center of each puff pastry rectangle. (The sausage should stretch the full length of the pastry).

Step 5

In a small bowl, beat the remaining egg with 1 tablespoon of water. Brush all of the borders of the puff pastry with the egg and carefully roll the pastries over the sausage mixture to create a log shape (making sure that the borders overlap slightly). Place each roll seam side down on a sheet tray lined with parchment paper. Freeze for 30 minutes or refrigerate for up to 1 hour. (Hang on to the egg wash for later).

Step 6

Preheat the oven to 400 degrees. Using a sharp knife, cut each sausage roll into 6 equal portions. Transfer the pieces to a parchment lined baking sheet, seam side down, about 1-inch apart. Brush the tops of the rolls with the egg wash. Bake for 20-22 minutes, or until the puff pastry is puffed and golden on top.