Preheat the Oven:
Set your oven to 200°C (400°F) and prepare a baking tray with parchment paper. As the rolls bake, your kitchen will soon be filled with an enticing, savory aroma.
Prepare the Filling:
In a large mixing bowl, combine the ground beef, French onion soup mix, breadcrumbs, and the beaten egg. Stir until the ingredients are thoroughly incorporated and the mixture is evenly seasoned.
Shape and Fill the Pastry:
Cut each puff pastry sheet in half to create four rectangular pieces. Divide the prepared beef mixture into four portions, shaping each into a long log. Place a beef log along one edge of each pastry rectangle.
Roll and Secure:
Roll the puff pastry around the beef filling tightly, using a little water to seal the edges. Arrange the rolls seam-side down on the lined baking tray. Brush the tops with milk for a glossy finish and, if desired, sprinkle with sesame seeds.
Bake the Sausage Rolls:
Place the tray in the oven and bake for 20-25 minutes, or until the pastry turns a golden-brown hue and the beef is thoroughly cooked.
Cool and Slice:
Allow the rolls to cool for a few minutes before cutting them into bite-sized pieces. Serve warm with a dipping sauce of your choice or enjoy them as is. Each bite is a delightful blend of crisp pastry and savory filling!
