The secret is the apple. It adds a sweet and tart layer of flavour that turns this Australian and English favourite into something worthy of your afternoon tea.
Preheat the oven to 180°c. Line a baking tray with baking paper. Set aside.
Finely chop the leek. Add olive oil to the frying pan and lightly brown the leek over medium heat until golden.
Grate the apple and place it on the tea towel. Twist the tea towel to stop the grated apple from escaping, then twist to squeeze out any extra juice from the apple. Place the grated apple in the mixing bowl.
Add the minced pork, grated apple, browned leak and mustard to the mixing bowl. Season with salt and pepper and some grated nutmeg. Use your fingers hand to mix the ingredients together.
Prepare your puffed pastry, defrosting it or rolling it out if needed. Lay it out on a flat surface. Take some of the filling and place it out on the puffed pastry to form a log approximately 2-3 cm from an edge of the sausage roll. Make sure the filling is compact, without gaps.
Beat the egg yolk. Brush edge of pastry with egg yolk. Then roll the pastry and the filling log so that the pastry is rolled around the filling, finishing with the seam side down. Seal on the edge with egg wash on it.
Cut the pastry-encased log into smaller pieces, 3-4 cm wide and place on a tray. Prick the pastry on top of the mini sausage rolls with a fork or knife, then brush the pastry with egg.
Bake for 30 minutes or until golden brown.
Notes
If you can, use lean pork mince. If you can't get minced meat, use pork sausages. To account for the higher fat content, add three-quarters of a cup of fine (panko) bread crumbs.