To make Palak Pappu with chana dal, wash chana dal well and soak for 30 mins.
Drain the water; take a pressure cooker and add chana dal, turmeric, and one-and-a-half-cups water. Cook for about 7-8 whistles or until the dal is tender. Keep aside. When it cools down sufficiently, add ½ tsp of salt to the cooked dal and mix well.
Heat oil in a frying pan over medium heat. Sizzle mustard and cumin seeds.
Then add curry leaves, red chilli and hing. Sauté for a few seconds.
Add the onion and green chilli. Fry till the onions turn translucent.
Put in the chopped tomatoes and cook till the tomatoes soften. Add salt to taste.
Add chopped palak and combine all the ingredients well.
Cover and cook till the spinach wilts and all the ingredients are well incorporated.
Remove the lid and stir in the cooked lentils.
Simmer the spinach dal for about 5 minutes on low-medium flame, allowing all the flavours to mingle.
Remove and serve Palakura Pappu hot with white rice or roti.