Chicken tikka masala

Name: Chicken tikka masala
Prep time: 20 min
Cook time: 1 h 10 min
Total time: 1 h 30 min
Cuisine: Asian, Indian
Ingredients: 800 g skinless, boneless chicken thighs, cut into cubes (3 cm); 1 tsp Kashmiri chilli powder; ¼ tsp ground turmeric; 1 tsp salt; ¼ tsp ground cinnamon; 2 tsp ground cumin; 1 tsp ground coriander; 2 tsp garam masala (see Tips); 1 tbsp brown sugar; 1 tbsp garlic paste (see Tips); 1 tbsp ginger paste (see Tips); 1 tbsp tomato paste; 100 g natural yoghurt; 40 g ghee (see Tips); 1 - 2 brown onions (approx. 180 g), cut into quarters; 2 tsp ginger paste (see Tips); 1 tsp garlic paste (see Tips); 6 cardamom pods (green); 1 tsp fenugreek seeds; ½ tsp ground turmeric; 1 tsp Kashmiri chilli powder (optional); 100 g pouring (whipping) cream; 60 g tomato paste; 1 tsp brown sugar; 1 - 2 pinches salt; 1 - 2 pinches ground black pepper; fresh coriander, leaves only, for garnishing