METHOD
1.Wash mushroom neatly.
2.If mushroom is small keep them like that.other wise cut into two pieces.
3.Cut onions, capsicum, tomato in square pieces
4.Put oil in a pan.
5.Add cumin and mustard seeds
6.Add green chills, onions
7.Fry onions till golden brown
8.Add capsicum and cook till soft
9.Add tomato and cook little bit