Beans with Mustard & Amchur

A and I love mustard. Especially the grainy variety. Tried this recipe the other day - the beans I used were some local variety that were bitter, almost like radish leaves. However, I think this recipe would be good with the long, string beans that you normally see in Asian cooking -

Serves 2

Ingredients
Bunch String beans (about 20)
3 tbsp mustard oil
1 bay leaf
1/2 tsp cumin seeds
1/2 teaspoon
5-6 whole dry red chillies, broken
Pinch asafoetida
1 tsp mustard powder
Salt to taste
3 tbsp whisked yoghurt

1 tsp red chilli powder
1/2 tsp turmeric powder
1 tbsp garam masala powder
1/2 tsp dry mango powder (amchur)
1 tsp coriander powder
1/2 tsp sugar

Method
Cut beans into inch long pieces. Steam in microwave on high for 4 minutes or until half-cooked. Heat mustard oil in a pan. Add bay leaf, cumin seeds, broken red chillies, asafoetida, mustard powder and stir. Add beans and salt. Mix well and add yoghurt. Mix all the powdered masalas in a bowl and add a little water. Add to the beans and mix. Serve hot with rotis.