Marinate the prawns with marination ingredient for 30 minute.
Heat oil in a wok and fry prawns till almost done and tail turns bright red. Remove and keep aside, using same oil
saute cumin seed till it start crackling, add onion and saute till deep golden in color, add turmeric powder and green chilly, saute again and add toamto and continue stir-cook till soften an mash
Add Coriander powder, salt, green bell pepper, red bell pepper, yellow bell pepper and stir to mix well. Add prawns and toss well.
Add coriander leaves, lemon juice and garam masala, toss again to mix well.