Tip the mince into a large bowl. Core and finely dice the apple, then add to the pork along with the paprika. Season, then mix well with your hands. Shape into 4 round burgers, flattening them slightly.
Brush a griddle or frying pan with a little oil and place over a medium heat. Add the burgers and cook for about 12 minutes, turning halfway, until browned and cooked through. Set aside to rest.
Brush the cut side of each bun with oil, then griddle each cut side for a few minutes until toasted.
Put some salad leaves on 4 bun bases. Top with a burger, then a slice of cheese. Sandwich together with the bun tops. Serve with coleslaw and oven chips.