Tomatoes wash and dry it. And cut it into four pieces. Chop onions in slices. Ginger remove skin from it and cut it into slices.

Take a pressure cooker add chopped tomatoes, onions, ginger garlic,vinegar,sugar,salt red chilli,Mustard seeds, clave, black pepper and close needle make cook in low flame and afterwards make a whistles of 2.

Make it cool of Boiled ingredients in pressure cooker and grind it in fine paste in mixture grinder.

And remove pulp of grinded ingredients of ketchup or sauce boil it for few minutes.

By boiling of ketchup after grinding it increases flavor and preservation.