Preheat oven to 200°C fan.
Soak breadcrumbs in milk for 5 minutes.
Combine pork, onion, garlic, fennel, sage, paprika, soaked breadcrumbs, egg, salt and pepper. Mix with one direction for 1 minute until tacky.
Cut each pastry sheet in half. Lay a log of filling along the long edge of each rectangle. Roll up. Press to seal.
Slice each roll into 6 pieces. Place on lined trays seam-side-down.
Brush with beaten egg. Sprinkle with extra fennel seeds.
Bake 25-30 minutes until deep golden and the filling is cooked through.
Cool 5 minutes before serving. Tomato sauce, mustard, or chutney.