Peel and grate dudhi (lauki) with a bigger hole grater.
Then add 2 sliced onions, chopped green chili, ginger, chopped garlic, coriander leaves, turmeric powder, red chili powder, coriander powder, ajwain, amchur powder, garam masala, and lemon juice. Mix it well using your hand, and rub it with your fingers so flour and spices are coated to dudhi.
Add black salt and salt. Mix well with your hand and rest it for 5 minutes.
Now add besan, rice flour, baking soda, and hot oil. Mix well.
Then by adding a tablespoon of water at a time and mix well forming a soft dough. add water in small quantities to avoid from batter turning runny.
Now greases hands with water, pinch a ball-sized hand, and make a round shape.
Deep fry in hot oil keeping the flame on medium.
Stir occasionally, and fry on medium flame until the pakoda turns golden brown and crisp.
Drain off and dudhi na bhajiya is ready to serve.