First clean, debone and cut chicken pieces to 1 inch size.
Take a medium size bowl and put red chilli powder, ginger garlic paste, coriander powder, turmeric powder, yogurt, salt (1/2 tsp), lime juice and oil (3 tbsp). Make a marinade by mixing all these ingredients properly.
Apply this marinade to chicken pieces and leave it aside for 1 hour. You can apply this marinade to vegetables, tomatoes and slices onions also. After 1 hour skewer the chicken pieces and cook in a grill / tandoor / pan along with the vegetables. When chicken and vegetable pieces are half cooked take them off the heat.
Take a pan and heat oil (2 to 3 tbsp) in it. Once it is hot add whole garam Masala, green cardamom, cloves, cinnamon sticks and cumin seeds. As seeds starts sputtering add finely chopped onions. Sauté for a minute and add salt(1/2 tsp) , turmeric powder(1/2 tsp), cumin powder (1 tsp), coriander powder(1 tsp), chilli powder. Add little water so that masalas get evenly cooked. Add tomato puree. Put the lid and let it cook for 10 minute on medium flame.
As the mixture stars boiling add chicken and vegetable pieces. Cook for few more minutes and serve hot your chicken tikka masala after garnishing with Coriander leaves.
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