Thinly slice brown onions. Heat oil in a fry pan over medium heat. Add onions and cook for 10 minutes or until browned, stirring occasionally. Add the brown sugar and white wine vinegar, mix and cook for 3 minutes or until onions are caramelised, stirring occasionally. Set aside for 5 minutes to cool slightly.
Preheat your oven to 180°C and line a baking tray.
Place caramelised onions in a bowl along with Our Cow Grass Fed Beef Mince, egg, bread crumbs, dried thyme, and tomato sauce. Season with salt and pepper and use your hands to combine.
Cut each pastry sheet into quarters. Place a generous handful of the mixture along one edge of the pastry and roll to enclose the filling. Cut each roll in half.
Place on the lined baking tray. Brush with egg wash and sprinkle with sesame seeds.
Bake for 35-40 minutes or until pastry is golden brown.
Enjoy!
Tip: If you have any leftovers, reheat in the air fryer!