Combine all the ingredients and knead into a semi-soft dough using enough water. Knead well for 4 to 5 minutes.
Cover the dough with a wet muslin cloth and keep aside for 15 minutes.
Divide the dough into 12 equal portions. Keep aside.
Combine the green peas, green chillies and ginger and blend in a mixer to a coarse mixture without using any water. Keep aside.
Heat the oil in a deep non-stick pan, add the nigella seeds, fennel seeds, bay leaves and green pea mixture and sauté on a slow flame for 6 to 7 minutes.
Add the chilli powder, garam masala, coriander and salt, mix well and cook on a medium flame for 1 more minute, while stirring occasionally.
Remove the bay leaves and discard. Divide the filling into 12 equal portions. Keep aside.