wash and cut tomatoes into 4 halves.Fill a utensil with the tomato pieces, close with a lid and boil on a low flame. Stir with a spoon regularly to avoid tomatoes from sticking to the bottom of the utensil. When tomatoes turn soft turn off the gas.Mash the boiled mixture and filter using a steel strainer, grind the remaining tomato pieces in a mixer then put them on the strainer and filter by pressing with a spoon. Only the tomato skin and seeds should remain in the strainer, throw these away.Place the utensil with the filtered tomato pulp on the gas to make it thick. After the pulp comes to boil and gets thick add sugar, black salt, Sauntth powder and garam masala. Regularly stir the ketchup which is cooking to prevent it from sticking at the base. Cook the tomato sauce till it becomes sufficiently thick in textur Turn off the gas.Home Made Tomato Ketchup is ready, cool the tomato sauce, add vinegar and fill in a clean, dry glass bottle.