Wash the dal nicely and put it in a pressure cooker. Add chopped cabbage, chopped onion and one cut green chilly.
Add turmeric powder and required amount of water to cook the dal(1 cup should be sufficient). Mix well and pressure cook till 2 whistles.
Mix the cooked cabbage, dal and onion with a spatula. Add red chilly powder, coriander powder, required salt and mix thoroughly.
Grind grated coconut with cumin seeds, crushed pepper corns and one green chilly to a fine paste.
Add this paste to the cooked cabbage and mix well in low heat. Do not boil the curry. Remove from fire.
Take a small kadai and heat oil. When the oil is hot, splutter mustard seeds. When it splutters, add the curry leaves. Add this to the curry.
The curry is not very spicy, even kids will like it.
Serve this curry with rice as a simple side dish.