Heat oil in a pan and splutter mustard seeds and Fenugreek seeds.
Add curry leaves, crushed garlic and saute for few seconds.
Then add chopped tomato, green chilly and fry in medium flame. Keep stirring until tomatoes break down, get cooked and become pulpy. This should take roughly 5-7 minutes for this quantity.
Now add chopped raw mango. Mix well. Then cover and cook for 5 more minutes on low flame.
Finally add all masala powders: Kashmiri Chilly Powder, Red Chilly Powder and Turmeric Powder. Add sugar and salt as required. Saute for one minute to let off the raw smell of masala powders.
Add 1/2 cup water and cook till it becomes a thick consistency.