Using a circular pastry cutter, cut 12 circles, just larger than each dip of the muffin tin. Also cut 12 small star shapes - you should have enough space in 3 wraps to cut all the items you need.
Push each circle of wrap carefully into each dip in the muffin tin. Place a teaspoon of mincemeat into each one and top with a small star.
Beat the egg in a small bowl and brush over each star. Place into the oven for 22 minutes until golden and crisp.