Boil tomatoes for 5 minutes. Once it is done. Drain the excess water. Cool it. Peel the tomatoes and blend it. Keep a side. Heat oil in Kadai. Add crushed garlic. Saute it for few minutes. Then add chopped onion fry it for few minutes. Then add tomato puree, black pepper, salt and little sugar. Cook in low flame till it becomes gravy. Once it is done. Transfer to a bowl and keep aside.