Take 2 pieces of large, long black brinjals and cut them in thin, long pieces. Wash them nicely.
Take 1 cup of besan (gram flour), 3 tsp of rice flour, ½ tsp of turmeric powder, ½ tsp of red chili powder, ½ tsp of roasted cumin powder, salt to taste and mix them nicely. Then add water gradually as required.
Whisk nicely to make a relatively thick batter. Check with your finger. It should have a dropping consistency. Add ¼ tsp of baking soda and mix again.
Now, sprinkle a pinch of salt on the brinjal pieces and mix nicely.
Heat an adequate amount of cooking oil in a kadai. Take a spoonful when hot and add it to the batter. Mix nicely.
Now, coat each brinjal piece with the batter nicely on both sides and release in the hot oil carefully.
Sprinkle hot oil on the surface while frying. Flip when one side is cooked. Remove when both sides turn to a nice brown color.
Your crispy and tasty homemade beguni is ready. Serve hot.