Hot-peppered lamb curry

Name: Hot-peppered lamb curry
Cook time: 1 h
Total time: 1 h
Cuisine: Indian, American, Asian
Ingredients: 2 fresh long green chillies; 2 tablespoon ghee; 600 gram (1¼ pounds) boned lamb leg, chopped coarsely; 2 large_piece (400g) brown onions, sliced thinly; 3 clove garlic, crushed; 4 centimetre (1½-inch) (20g) piece fresh ginger, grated; 3 cloves; 4 green cardamom pods, bruised; 2 cinnamon sticks; 2 teaspoon coarsely cracked black pepper; 2 medium_piece (300g) tomatoes, chopped finely; 1/4 cup (70g) yogurt; 1/2 cup (125ml) water; 1/4 cup (60ml) lemon juice; 1/3 cup fresh coriander (cilantro), finely chopped