Thalassery Chicken Biriyani

Name: Thalassery Chicken Biriyani
Ingredients: 1.2 kg chicken full chicken cut to medium pieces; 8 medium onions; 20 green chillies moderately hot; 15 cloves garlic; 2 inch ginger; 7 medium tomatoes ripe; 1 cup mint leaves chopped; 1 1/2 cup cilantro coriander leaves; 1 teaspoon cumin seeds; 2 teaspoon fennel seeds; 3 cardamom; 4 inch cinnamon pieces; 1/4 nutmeg one small piece; 4 tablespoon yogurt; salt to taste For rice; 800 gram basmati rice 4 cups; 3 bay leaves; 2 cardamom; 2 inch cinnamon piece; 1 star anise; 1 mace; 10 black peppercorn; 1 lime small; salt to taste For garnish; 2 onions thinly sliced; 1 cup sultana raisins; 1 cup Cashew nuts; salt to taste