Bonda with mashed potato

Ingredients:
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1 medium Onion
2 cups Potato buds
1 1/2 cup Peas and carrots
2 big ones Green chilies
1 teaspoon Lemon juice
1 cup Gram flour
1/2 tsp Mustard seed
pinch Turmeric
1/2 tsp Baking powder
1/4" piece Ginger
1 small bunch Coriander leaves
2 tsp Salt
Oil
Method:
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The filling is prepared as follows:
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Mix potato buds and 1/2 teaspoon of salt with 1 cup of hot water.
Finely chop ginger, chilies, coriander leaves, and onion. Heat oil
(about 5 Tbsp) and add mustard seeds. Add chopped ingredients and fry
until onions are brown. Add carrots, peas, turmeric and 1 tsp of salt
and cook on low heat for about 10 minutes. Add potato (now mashed) and
fry for 5 minutes. Remove from heat, add lemon juice and let cool.
The batter is prepared as follows:
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Combine gram flour, 3 Tbsp of oil, 3/4 cup water, 1/2 tsp salt, the
baking powder and mix thoroughly
After the batter is prepared, make small balls out of the filling and
roll them in the batter. Next fry it in hot oil. You will get about
20-30 small bondas.