In a bowl, combine mince, onion, parsley, lemon zest and seasoning

Form mixture into four burger patties and cook in a fry pan, under the grill or on the BBQ

Cut avocado in half, remove seed and skin, cut flesh into chunks, drizzle with lemon juice, add yoghurt, mint and season with salt and pepper, then set aside

Toast the rolls lightly, place patty, chilli jam, tomato, avocado mix into the rolls and serve