How to cook :In a pan, heat the mustard oil and add the pureed onion paste. Add ginger garlic paste and stir well. Cook this on medium flame till brown. Keep stirring the onions to avoid burning and ensure its cooked and browned evenly. Now, add salt, turmeric powder, coriander powder and add 1/4th cup water along with these masalas. Water helps the onion paste to mix well and masalas to blend nicely.