Raddish-Potato curry

In my mom's place we raddish only in Sambar. This is something which I tried myself (sondha saagithyam!) but it came out really well. The main ingredients are as follows:
Ingredients:-

1. Raddish - 1 (if its big; 2 if its small)
2. Potato - 2
3. Onion - 1 (finely chopped)
4. Garlic - 1 clove (finely chopped - can also be avoided)
5. Ginger - a small piece
6. Curry powder - 1/2 tsp
7. Garam masala powder - 1/4 tsp
8. Green chillies - 1(acc to taste)
9. Oil - 2 tsp
10. Mustard seeds - 1/2 tsp
11. urid dal - 1/2 tsp
12. cumin seeds - 1/4 tsp
13. Asafoetida powder - a pinch
14. Turmeric powder - 1/4 tsp
15. Coriander leaves - 1 tbsp

First, pressure cook the raddish and potato upto 2 whistles. Remove the skin and mash it. Keep it aside. Now take a wide pan, pre heat the oil, add mustard seeds, when it splutters add urid dal, cumin seeds, asafoetida powder, green chillies and stir it for a minute. Add the finely chopped onion to it and stir it. Now add turmeric powder, salt and curry powder (See Receipe) to it and stir it for 2 mts. Now add the mashed raddish and potato to it and mix everything well. Finally add the garam masala powder to it and let it cook for another 2 mts. Make sure the onion mixes with the raddish-potato. Now Raddish-potato curry is ready to serve. Garnish it with Coriander leaves.