Firstly take a pressure cooker and add 7 to 8 tomatoes to it. Add 1 cup of water to it.
Pressure cook for 1 whistle and let it stay in the cooker for another 2 minutes until steam releases.
Now peel and transfer them to a bowl.
Add the peeled tomatoes and red chillies to a blender.
Blend them into a thick puree.
Now finely chop the onions and garlic.
Heat a pan on medium high flame and add two tablespoon of refined oil to it.
Now slowly add the chopped onions and garlic to it and stir well.
Cook them until they turn golden brown and aromatic.
Reduce the flame to low and now add the tomato and chilli puree to it. Give them a good stir and cook it for 2 minutes or so.
Now add 1 tablespoon of oregano to it.
Add 1 tablespoon of chilli flakes to it.
Now add 1 tablespoon of sugar to it and mix them well.
Add salt as per taste.
Add 5 to 6 tablespoon of tomato ketchup and keep on stirring it.
Add 1 tablespoon of schezwan sauce to it.
Mix everything together and turn the flame to medium high.
Add 1/2 tablespoon of black pepper to it.
Finally add 1 tablespoon of vinegar and mix them all together.
cook it for 2 to 3 minutes, until it starting bubbling and popping.
Turn of the flame and transfer it to a bowl.
Your Pizza sauce is ready. Spread it well and enjoy your yummilicious pizza.