Soak twelve 6-inch wooden skewers in water for 30 minutes.
Grind together green chillis and cilatro into a smooth paste ( with out adding water)
In a bowl take chicken cubes, ginger and garlic paste,salt, green chillis and cilantro paste,sour cream,bell pepper and onion cubes,oil .Mix everything and marinate for 1 hour .
Now thread chicken , bell pepper and onion cubes in to wooden skewer and arrage in a baking sheet.
Pre heat oven to broil mode and broil chicken 8 to 1o min on each side.