Blend the tomatoes to get a smooth paste

Bring the oil to medium heat, sauté onions, add in garlic and ginger, mix until the raw taste is dispelled.

Add the tomato sauce you blended, at this point sprinkle in a little salt

Allow it to come to a boil, add in the tomato paste and mix it well, then add in the ketchup. You can also add in a tablespoon or two of water incase the sauce is too thick.

Stir the mixture, then finally add black pepper and oregano and some salt too incase it isn't enough.

Your sauce is nice and thick and ready to use. Enjoy!