20²µ/¾´Ç³ú fresh coriander, stalks and leaves
30g/1oz fresh coriander leaves
4 large garlic cloves
4cm/1½ in piece fresh ginger
crunchy lettuce leaves
15g/½oz fresh mint leaves, or 1 tbsp good quality dried mint
1 small onion, quartered
1 onion, sliced crosswise into large rings
2 ripe plum tomatoes, sliced crosswise
½ tsp freshly ground black pepper
2-3 green chillies, chopped or ½-1 tsp red chilli powder
¾ tsp ground cumin
1½ tsp garam masala
2 tbsp oil, for greasing
1 tsp salt, or to taste
salt, to taste
2 slices thick-cut white bread, processed to crumbs in a food processor
1 large free-range egg
200g/7oz Greek-style yoghurt
450g/1lb lamb mince
6 hamburger buns