Squash the onions, garlic, ginger, curry leaves, chilies, lemon juice, turmeric powder and salt.
Add the tuna and coconut, and mix into a thick paste-like mixture.
Shape the mixture into small marble-sized balls.
Add the oil and salt into the flour.
Add warm water and knead until you have a dry, smooth dough. Add the water gradually to make sure the dough does not turn out too sticky.
Shape the pieces of dough into cups and place filling inside; then close the cups and smooth into balls.
Deep fry over medium/low heat until brown and crisp.
Serving Size 4 - 6 people