Beerakaya-Tomato chutney

This chutney is delight with hot rice and ghee. The sweetness of beerakaya or ridge gourd is easily evident in every spoon of rice :) . Here is the recipe
INGREDIENTS 
Beerakaya/Ridge gourd :- 1/2 kilo chopped into pieces after removing outer layer)
Tomatoes:- fully ripen :- 4 large
Green chillies :- 4-5(adjust)
Chana dal :- 1 teaspoon
Urad dal ;- 1 teaspoon
Jeera :- 1 teaspoon
Mustard seeds :- 1 teaspoon
Oil:- 1 tablespoon

Salt :- as required
Tamarind :- lemon sized ball
For Tempering/seasoning :-
Urad Dal :- 1/2 teaspoon
chana dal:- 1/2 teaspoon
jeera :- 1/2 teaspoon
aavalu/mustard seeds :- 1/2 teaspoon
Dry Chillies :- 2-3
Curry leaves :- 2-3
METHOD :-

1. Take a deep frying pan add 1/2 of oil and add chana dal ,urad dal,jeera and mustard into it and allow them to splutter.
2. Add ridge gourd pieces, tomatoes and green chillies and salt and close the lid and allow them to cook.
3. Meanwhile soak tamarind of water and squeeze out the pulp.
4. Now after ridge gourd-tomato are cooked take them into a grinder along with tamarnd pulp and grind them into smooth paste.
5. 
   
6. In the same pan add remaining oil and add all the seasoning agents and allow them to splutter.
7. Add this to the ground paste.