Cut the apple into slices approximately 1cm thick, you’ll need the best 4 rounds for your burgers, save the rest for snacks.
Cut the core out of each slice.
Wrap a piece of fruit leather around each slice of apple, trimming so there is just a little overlap. You can use a dab of peanut butter to hold the leather in place, if you need to. These are your ‘burgers’.
Cut the waffles using a cookie cutter or glass that is roughly the same size as your apple slices. These are your ‘burger buns’.
Spread four of the waffle discs with peanut butter.
Stack an apple slice on top of each one of the waffles.
Spread with more peanut butter, filling the hole in the centre of each one.
Dab on the yogurt in three places per slice, just near the edge, so that it will drip out a little. This is your ‘mayo’.
Top each ‘burger’ with the remaining waffle discs.