In a bowl add moong dal and soak for 2-3 hours.
After 3 hours drain the remaining water and transfer dal to a cooking pan.
Add water to the pan next add salt and cook dal on medium flame for 10 minutes.
After 10 minutes strain the dal and let it cool down completely.
Now transfer dal into a grinder but keep 3 tbsp dal aside.
Now make a coarse paste of the dal.
Transfer both dal into a bowl add bread crumbs.
Next add onion, coriander leaves, curry leaves, dry mango powder, chilli flakes, chaat masala, cumin seeds, fennel seeds and corn flour.
Now add ginger garlic paste, turmeric powder, salt and mix well with hands making a dough of it.
Now add water and knead it again.
Now grease hands with oil and make a smooth patty of any shape and size.
Now heat oil on medium flame and drop patties in it.
Shallow fry till crispy from both the sides.