Rinse beans and add to a bowl, then crush with a potato masher. Heat the grill to high. Add the bread crumbs, chilli powder, coriander stalks and 1/2 the leaves, egg and 2tbsp of salsa and season to taste. Mix together well.

Divide the mixture into 6, wet your hands and shape into burgers. (If you want to freeze them do so now) the place them on a non-stick baking tray and grill for 4-5 mins on each side

To make the lime yoghurt, place the yoghurt in a bowl adding black pepper and remaining coriander leaves with yoghurt and also add the lime juice

Arrange the burger buns and top with any salad to the buns. Place the burgers onto the buns and add the remaining salsa on top and also the lime yoghurt

If want to cook them from frozen bake in oven at 200°C fan 180°C for 20/30 mins.