Butter Chicken

Name: Butter Chicken
Prep time: 15 min
Cook time: 4 h 5 min
Total time: 4 h 5 min
Yield: 6 portions
Ingredients: 2 tsp chili powder; 2 tbsp cumin seeds; 2 cinnamon sticks; 14 cardamom pods; 1 tsp black peppercorns; 2 heaping tsp sweet smoked paprika; 4 tsp coriander seeds; ½ tsp ground nutmeg; 1 tbsp turmeric powder; 1 tbsp freshly squeezed lemon juice; 8 oz plain yogurt; 1 heaping tsp tomato paste; 6 chicken thighs, air-chilled, boneless, skinless; 4 oz yellow onions; 1 piece ginger; 4 oz unsalted butter; 8 oz tomatoes; 1 heaping tsp salt; 20 curry leaves; 8 oz heavy whipping cream; 8 oz basmati rice; 35 oz water; 10 sprigs cilantro