Clean the prawns and squeeze out the water. Add chili, dhania, garlic, ginger, turmeric powder, salt and mix well. Boil prawns on low heat. Add 1 teaspoon of oil to the boiling prawns. When water evaporates and the prawns are dry remove from the stove. Heat the oil and put in the cinnamon. Add prawns and fry for 2 minutes. Add onions and fry until they turn brown. Sprinkle on coriander leaves, remove from the heat and serve.