Stuffed Chicken Bun

Name: Stuffed Chicken Bun
Ingredients: 2 cups refined flour (maida); 2 tbsp oil; 3 tbsp curd; 2 tbsp milk powder; 1/2 tsp baking soda; 1 tsp baking powder; 1/4 tsp salt; 1 tsp sugar; as required Water; 1 bowl boneless chicken pieces; 1 tbsp oil; 3 tbsp onion, ginger, garlic paste; 1/2 tsp cumin powder; 1 tbsp coriander powder; 1 tsp garam masala powder; 1 tsp turmeric powder; 1 tsp red chilli powder; as per taste Salt; 1 tbsp ghee; 1 onion chopped; 2 green chillies chopped; 1 tbsp sesame seeds; 1 tsp butter