Meanwhile, heat a frying pan with oil.
In a small bowl mix together all purpose flour and corn flour.
Sprinkle this over the marinating mushroom and toss well so that all the pieces are coated well and the mixture becomes dry.
Take small lumps of the mushroom mixture and drop into the hot oil.
Deep fry to a golden brown and drain it onto a kitchen paper.
Heat a pan with 1 tbsp oil. Add mustard seeds and let it splutter, now add fennel seeds and cook for 10 seconds till it releases its aroma.
Add chopped garlic and roast for 1-2 minutes till it changes color.
Add onions, green chilies, curry leaves, 1/8 tsp salt and cook over high flame till the onions turn translucent.
Add the deep fried mushroom fritters and toss well for 1-2 minutes, so that the onions and garlic coat the mushroom well. Remove from fire.
Mushroom Fry is ready.
Serve hot either as an appetizer or as an accompaniment with any fried rice of your choice.