Butter Chicken (the only recipe you will ever need)

I know its not Diwali anymore but I promise you need this recipe in your life. Ingredients For the chicken marinade: 800g chicken thigh, cut into bite sized pieces 200g plain full fat yoghurt 4 cloves garlic 2 tsps lemon juice 5 cm knob of ginger 1-2 green chillies 1 tsp garam masala ½ tsp turmeric 1 tsp ground cumin 1 tsp red chilli powder 1 tsp salt For the curry: 4 tbsp ghee (or 3 tbsps butter 1 tbsp oil) 1 large onion, sliced 1 star anise 1 cinnamon stick 3-4 cloves ½ tsp cumin seeds 2 tbsps garlic, minced or finely grated 1 tbsp ginger, minced or finely grated 1 tsp ground cumin 1 tsp garam masala 1 tsp ground coriander 1 tbsp tomato paste 400g crushed canned tomatoes 2 tsp red chilli powder (adjust to your taste preference) 2 ½ tsp salt (or to taste) 250ml double cream 2 tbsp kasoori methi (dried fenugreek leaves) Coriander (optional as garnish) Method Preheat the grill to th