- Take a mixing bowl. Add yogurt, gram flour, spice powders and mix well. 
- Keep 1 tablespoon marinade aside for the chopped bell peppers. 
- Add chicken pieces to the marinade and mix. 
- Add ginger garlic paste, minced garlic, lemon juice, salt and mix. 
- Keep this marinated chicken in refrigerator for 1 to 2 hours or even longer. 
- Add the chopped bell peppers in the 1 tablespoon marinade which was kept aside, mix and keep in refrigerator. 
- Light the TTK Prestige barbecue charcoal grill. 
- Oil the grill plate so that the chicken does not stick to it while getting barbecued. 
- Carefully thread the marinated chicken pieces onto the skewers in such a way that after ever 2 pieces thread 1 green and 1 red bell pepper piece onto the skewer too. 
- Place the skewers loaded with chicken and veges on the lighted charcoal barbecue. 
- Baste the chicken pieces with melted butter. 
- Cook for 5 minutes on one side and turn to the other. Keep turning the skewers so that chicken gets cooked on all sides. 
- After chicken is cooked, take it off the grill. 
Garnish with coriander leaves and sliced onion and serve hot.