Step 1

Place lentils and potatoes in a saucepan with 2 cups of water. Bring to the boil, reduce heat and simmer, stirring, for 15 minutes until tender. Drain.

Step 2

Heat 1/2 tablespoon of the oil in a frying pan over a medium heat. Cook onion for 3 minutes, then add garlic and cumin. Cook for 30 seconds. Add lentils, potato and feta.

Step 3

Mash until combined, remove from heat and add tomatoes, coriander and mint. Season to taste.

Step 4

Using wet hands, form into 12 patties. Dip into beaten egg and coat in breadcrumbs. Chill for 30 minutes until firm.

Step 5

Heat a non-stick frying pan with half the remaining oil over a medium heat. Cook burgers in batches for 3-4 minutes each side until golden. Drain on paper towel. Serve with yoghurt.