Step 1

Cook the sweet potato in a saucepan of boiling water for 10 minutes or until tender. Drain. Return to the pan. Mash until smooth. Transfer to a bowl. Place in the fridge for 30 minutes to chill.

Step 2

Mash the chickpeas in a bowl.

Step 3

Add the chickpeas, onion, coriander, parmesan and flour to the sweet potato and combine. Season with pepper. Divide the mixture into 10 portions and shape each portion into a patty.

Step 4

Preheat oven to 180°C. Line a baking tray with non-stick baking paper. Place extra parmesan on a plate. Press patties in parmesan to coat. Place on the lined tray. Spray with olive oil spray. Bake in oven, turning once, for 30 minutes or until golden. Divide among serving plates. Serve with lettuce and sweet chilli sauce.