Wash and chop tomatoes in small pieces.
Heat oil in a broad pan and add the chopped green chilies and capsicum pieces.
Stir fry for a minute on medium heat.
Now add oregano and basil and stir for a minute.
Add the chopped tomatoes and cook on medium heat till they become soft and mushy.
Now add the tomato puree ,salt, sugar,chili flakes and pepper powder and cook on low heat.
When sauce become thick add the tomato ketchup and cook for a minute.
Check the seasoning and adjust salt and chili if needed.
When sauce cool down completely then spread on pizza or use to make pasta.
The left over sauce can be easily stored for a week in the refrigerator.