This is one of the standard recipes in wedding menus.
Level of sweetness & thickness can be varied to individual taste.

Select ripe, bright red tomatoes.

Blanched & chopped tomatoes - 1 cup

Sugar - ½ cup

Cornflour - 1 tbsp mixed with ½ cup of water

Cardamom powder - ¼ tsp

Pachai Karpuram (edible camphor) - a grain

Salt (be careful!)

To temper:

Ghee - ½ tsp

Mustard seeds - ½ tsp

Boil tomatoes with sugar & salt, till soft.

Add cornflour Mixture & cook on a low flame to prevent lump formation.

When a sauce like consistency is reached, add spices.

Remove & temper.