Take tomatoes and make slashes all over the tomatoes..Heat water in a sauce pan,bring it to a boil. Add the tomatoes in and cook for 1 mins. Remove it and place in ice cold water. Now peel away the skin, it will come pretty easily.
Chop up these peeled tomatoes and add it to a blender and make into a puree.
Add this puree, sugar, cardamom and salt in a kadai and heat it up. Mix well.
Bring this to a boil and cook it for 15 mins. It will turn reddish colour.
When it gets thick add a tblspn of ghee and mix well..
It will be thick and glooby. Allow it to cool down.
Transfer it to a clean container and store in fridge.