Tomato khatta ( tomato chutney -- odia style)

This is a very simple and tasty preparation of tomato-- khatta(chutney), made in my state of Odisha. Out of the 56 food items offered to Lord Jagannath daily ,this khatta is also offered to  Him. Thereby this item is very dear to all Odiyas. The non use of onion and garlic makes this recipe even more easy and simple.
Today when I was thinking about what I should  make for my husband's lunch box ,I thought of making this, which is his favourite, and, spring a surprise in him ! :D. Here goes the recipe, enjoy and happy cooking. 

Ingredients -
Tomato -4 ( chopped)
Ginger -1/2 inch (crushed)
Oil-1 tbsp
Mustard seed -1 tspn
Sugar - 2 tbspn or to taste
Salt- To taste
Asefotida - A pinch
Green chilli -1 (chopped )
Curry leaves-4-5
Dates (khajur)-- 4/5 pieces
Kismis-- 5/6
Cardamom seeds-- a few

Method -

Heat oil in a pan, add asefotida and mustard seeds. Let it splutter, add green chilli ,ginger and saute for a minute or two. Add curry leaves ,chopped tomato pieces and saute .Add salt, sugar to taste and mix well. Cover the lid, till water oozes out from the tomatoes, then simmer the flame. Let the water evaporate slowly ,thereby making the tomato pieces soft .After water dries, mix the khatta well and serve with rice. You may add a few dates, kismis and cardamom seeds along with sugar.