Take a pan, add water (quantity as per need in which all the tomatoes can sink) and place the pan on fire for boiling water.

Wash tomatoes properly.

Cut the mark X at the bottom of all the tomatoes. It will help in removing the skin of tomatoes easily.

Put all the tomatoes in the hot water, cover them with a lid and boil for 3 to 4 minutes or until tomatoes turn soft.

Bring out all the tomatoes and place them in a plate.

Remove their skin.

Take 3 tomatoes, put them in a blend and blend to a fine puree. Keep aside.

Roughly chop rest of the 3 tomatoes. Keep aside.

Take a Kadai, add oil in it. Place on low flame.

10. Add finely chopped garlic and saute for a minute.

11. Add finely chopped onion and saute until turn soft.

12. Now add chopped tomatoes and mix well.

13. Add tomato puree and mix well.

14. Add basil leaves and mix.

15. Add red chilli flakes, oregano, sugar, red chilli powder and salt. Mix well.

16. Cover with the lid and let it cook  for 15 minutes on low flame.

17. After 15 minutes, when everything is cooked well, add butter and tomato ketchup. Mix.

Pizza sauce is ready.