Wash and soak matta rice, at least for 3 hours. If you cook in a pressure cooker, add 4 cups of water in 1 cup of rice. 1 whistle on medium high flame and other 4 whistles on a low flame.

Cook soaked black grams in a pressure cooker till 6 whistles blows. Wash, peel off banana, and yam. Cut in small pieces, soak in salted water.

Take a pan, and add water and salt. Now add yam and banana pieces. Cook till turns soft.

Take a mixer jar, add 1/4 cup grated coconut, jeera, and green chilli. Add water and grind coarsely. Keep ready paste.

Take a pan, add oil, hing, mustard seeds, dry red chilli, and curry leaves. Add rest of 3/4 cup of grated coconut. Roast till turns in brown colour.

Now add cooked black chana and coconut paste in cooked yam and banana. Add salt, turmeric powder, red chilli powder, and black pepper powder. Mix well.

Now add brown color roasted coconut powder in kottu curry.

Add tamarind pulp and jaggery. Mix well. Cook for 5 minutes on low flame. Then turn off gas.

Ready to serve Onam Sadhya Kootu Curry. Traditionally, it is served on a banana leaf. Serve with matta red rice and papadam. Enjoy..