firstly, slit x on bottom of tomatoes.
Add these tomatoes in boiling water and cover the vessel
Let the tomatoes boil for around 2-3 min or till the tomatoes start to leave the skin
Now train off the water and peel the tomatoes.allow them to cool completely
When cooled, blend the peeled tomatoes to smooth puree
Now take a pan and add oil to it and allow it to heat
Add chopped garlic to oil and saute
Also add chopped onion and saute till slightly golden brown
Add to it the tomato puree and mix well
Now add salt, sugar, basil, red chilli powder, oregano, chilli flakes and give it a good mix
Cover the pan and shimmer the sauce for around 2-3 min
Also add tomato sauce to it
Mix well and your homemade yummy pizza sauce is ready to be applied on pizza.Enjoy
Your pizza sauce stays fresh for 15-20 days when stored in a air tight container.