Prepare Vatan: In a bowl, combine onions, dry coconut, ginger, garlic, green chilli, degi red chili powder, coriander powder, turmeric powder, oil, and white sesame seeds. Grind into a smooth paste and set aside.
Cook Chana: In a pressure cooker, add soaked black chickpeas, water, salt, and dry Kashmiri red chillies. Cook for 3-4 whistles until well cooked. Set aside.
Wash & Soak Poha: Wash thick flattened rice gently 2-3 times with water. Let it rest.
Prepare Tadka: In a pan, heat oil and add peanuts, mustard seeds, cumin seeds, potato, onion, green chili, ginger, salt, curry leaves, and turmeric powder. Cook until onions are translucent. Set aside.
Prepare Tarri: In a handi, heat oil and add bay leaf, black cardamom, green cardamom, cloves, black peppercorns, and onion. Saute, then add prepared paste and cook for 7-8 minutes. Add black pepper powder, cooked chana, water, and simmer. Finish with tomatoes, coriander leaves, garam masala, dry mango powder, and salt.
Assemble Poha: In a bowl, mix soaked poha with fresh coriander leaves, salt, and prepared tadka. Transfer to a serving dish, pour prepared tarri over, and garnish with coriander sprig. Serve hot.