Kofta Kebabs With Chilli Yoghurt

Name: Kofta Kebabs With Chilli Yoghurt
Ingredients: 1 lb extra lean minced lamb; 1 small onion, finely chopped; 1 tablespoon of fresh mint, chopped; 1 tablespoon fresh parsley, chopped; 1 teaspoon fresh rosemary, chopped; 1⁄2 teaspoon mixed spice; 1⁄2 teaspoon ground coriander; 1⁄2 teaspoon ground cumin; salt and freshly ground black pepper; 4 flour tortillas; CHILLI YOGHURT; 200 g low fat greek yoghurt; 2 red chilies, seeded and finely chopped; 2 tablespoons fresh coriander, chopped; 1 garlic clove, crushed; 1 pinch caster sugar