In a pan, add oil, cumin seeds, hing, dry red chili, and bay leaf. Sauté for a minute.
Add chopped green chili, and ginger and sauté for a minute.
Now in the bowl, add 3 tbsp water, turmeric powder, coriander powder, and red chili powder. Mix well and add masala paste into the oil.
Cook masala till oil is separated from its sides.
Then add chopped tomatoes and salt. Cook till oil separates from its sides.
Meanwhile, cut the banana into medium-thick roundels.
When tomato gravy is properly cooked and released oil from its side, then add banana pieces and mix well.
Add 3 tbsp water and mix well. Cover and cook sabzi for 1-2 minutes.
Then add kasuri methi, garam masala, sugar, black salt, and lemon juice. Mix well.
Garnish with coriander leaves and serve kela nu shak with chapati or paratha.