Take besan, 1/2 tbsp salt, red chilly powder, turmeric and baking powder in large mixing bowl.
Pour water little by little and mix well. Make a moderately thick batter.
Now, boil the potatoes. Peel and mash them without making mushy. Mix chopped green chillies, grated ginger, chopped coriander leaves, amchur powder, red chilly powder, turmeric and salt.
Next step is to chop the tomatoes into round and thick slices in the shape of disc.
Take a tomato slice and cover it with potato stuffing over and around it.
Now, heat oil in a deep frying pan.
Dip slice into the batter so that it is coated well.
Fry the slice in oil on medium flame.
Stir, flip and fry till golden brown.
Remove from oil and place bonda on tissue paper.
Repeat this process for all the slices.
Your tomato stuffed aloo bonda is ready.