Chicken biryani

Name: Quick chicken biryani
Ingredients: 200g/7¼oz basmati rice; 1 tsp salt; 2 tbsp vegetable oil; 8 shallots, chopped; 2 medium onions, chopped; 4 garlic cloves, finely chopped; 2 tsp fresh root ginger, grated; 2 chicken breasts, thinly sliced into strips; 1 tsp chilli powder; 1 tsp ground cumin; 2 tsp ground coriander; ½ tsp ground cinnamon; ½ tsp ground turmeric; generous pinch freshly grated nutmeg; ¾ cup plain yoghurt; 2 tsp caster sugar; 4 or 5 handfuls raisins