Lentil Burgers

Step 1: Put sweet potato and water in a shallow microwave dish and cover and cook on high/100% for 6 to 7 minutes and then drain and transfer to a large bowl and add lentils and mash until smooth.

Step 2: Heat 1 tablespoon of the oil in a small non-stick frying pan over a medium heat and add onion and cook, stirring often for 6 to 7 minutes or until soft and then add zucchini and cook for a further 2 to 3 minutes or until zucchini is just cooked.

Step 3: Add the curry paste and cook, stirring, for 1 minutes and then set aside for 10 minutes to cool slightly.

Step 4: Add onion mixture, breadcrumbs and egg yolk to lentil mixture and stir until combined.

Step 5: Using you hands shape mixture into 6 even patties and transfer to a plate, cover with plastic wrap and refrigerate for 30 minutes to chill.

Step 6: Heat remain oil in a large non-stick frying pan over a medium heat and add patties and cook for 3 minutes on each side or until golden.

Step 7: Divide spinach leaves between roll bases and top with lentil patties and spoon over beetroot relish and yoghurt and add roll tops and serve.

Step 8: FREEZER TIP - Left over cooked patties can be frozen for up to 3 months and simply wrap individually in plastic wrap and freeze in a resealable freezer bag. Defrost in the fridge then put on a tray lined with baking paper and bake at 180C fan forced for 10 to 125 minutes or until heated through.