Paruppu usili

Again, from Gita Iyer (Agraharam recipes YouTube)

I usually make the whole amount of the steamed usili mixture specified below and split it into two and freeze one of the halves. It de-freezes beautifully (take out of the freezer the previous night and put it into the regular refrigerator section) to make another batch of paruppu usili. If you do that, reduce the beans amount by half.

Ingredients
Tur dal 1/2 cup (soak for 2 hours)
Channa dal 1/2 cup (soak for 2 hours)
Red chillis - 6
Turmeric - 1/2 tsp
Hing - 1/4 tsp
Curry leaves - 10
Salt
Green beans - About 40 (chopped)

Tempering:
Oil
Mustard seeds - 1 tsp

Method
1. Grind the soaked dals with red chilis, turmeric, hing, curry leaves and salt. No extra water should be added and it should be ground a little coarsely.
2. Put the ground dal mixture into a pan making little depressions here and there and pressure cook this for 12 minutes.
3. When the usili is cooled down, crumble it with your fingers.
4. Add a generous amount of oil to a pan and pop the mustard seeds.
5. Add the chopped beans with a little water and cook till beans are soft (should not be mushy)
6. Add the usili mixture, mix well and roast till you can see brown spots here and there.