Take 2 tbsp oil in the pan and add in 2 chopped onions fry till it is golden brown. Take out the onion and put it in ½ cup yogurt. Grind it. Add in ½ kg chicken pieces, salt and 1 tbsp chopped ginger garlic paste in it. When the water of the chicken dries add in yogurt, onion, 1 tsp crushed black pepper, 4 green chilies and 4 red chilies. cook it. Then add in 2 boiled potatoes. Add in 1 tsp margarine sauté potatoes and carrots. Add in chicken and simmer it at a slow flame. Vegetables with chicken curry would be ready in 10 minutes to serve.