How to make simple home made Butter chicken /ബട്ടർ ചിക്കൻ റെസിപ്പി

This is a simple home made butter chicken recipe suitable for rice,chappati or appam.
Ingredients:
Chicken – 750gm
Onion – 2 big sized
Tomato – 2 medium sized
Ginger – 1 tbsp(chopped)
Garlic -1+1/4 tbsp
Cumin seeds – ½ tsp(optional)
Kasuri methi – ½ tsp
Kashmiri chilli powder – 1 tsp
For marination:
Red chilli powder – 2 tsp
Turmeric powder – ¼ tsp
Garam masala – ½ tsp
Salt
Oil and butter
Water