preheat oven to 200c. Line 2 oven trays with baking paper.
place the egg and cornflake crumbs in separate bowls. Dip a piece of chicken into the egg then in the cornflake crumbs, tossing to coat. Place on 1 prepared tray.
use a 4cm-diameter star pastry cutter to cut stars from the sweet potato slices. Place on the remaining tray.
lightly spray the chicken and sweet potato with olive oil spray. Bake the sweet potato for 10 minutes. Add the chicken and bake for a further 10-15 minutes or until the nuggets are cooked through and the sweet potato is tender. Serve with sweet chilli sauce and salad leaves.