- Heat up oil in a pressure cooker. Add mustard seeds and let them pop up. When mustard seeds pop up, lower down the gas to low. Add cumin seeds, hing, curry leaves, turmeric powder, coriander powder, garam masala, and red chili powder. Mix well and fry for about a minute. Take chana dal and soak it in water for 4 hours. Add soaked chana dal and water. Mix well. Cover and steam for about 5 minutes. Add bottle gourd, jaggery, and salt to taste. Add fresh coconut and mix well. Add a little water and mix well. Close the lid and cook on medium heat until just 1 whistle. Add coriander for garnishing and dudhi bhopla bhaji is already.