Bitter gourd vegetable ( Karele ki Sabji)

Bitter gourd vegetable (Karele ki  Sabji)
I had got this recipe from my friend long time back. It is a very tasty recipe which can be had with rice or chappati.
Ingredients
500 grams bitter gourd thinly sliced
1 big onion sliced
1 big tomato chopped
4 to 5 Curry leaves
1/2 tsp mustard seeds
1 red chilli
Salt to taste
1/2 tsp turmeric powder
1/2 tsp coriander powder
1/2 tsp chilli powder
2 tsp jaggary
1 tsp tamarind paste
2 tbsp oil
Chopped coriander for garnished
Method
Take a pan and add oil. As the oil heats up add curry leaves, red chillies and mustard seeds. Once the mustard seeds crackles then add the sliced onions. Saute the onions for 5 minutes. Add the thinly sliced bitter gourd. Saute it for 5 minutes. Add salt and  cook it till the bitter gourds are half cooked stirring it periodically. Add the chopped tomatoes, turmeric powder, coriander powder, chilli powder and cumin powder. Cover the pan and cook it on a slow flame stirring  the vegetables in between till the bitter gourds are cooked. Now add jaggary and tamarind paste and cook it for 5 minutes more. To serve garnish it with chopped coriander leaves.