Rinse or wipe and then chop 200 grams white button mushrooms. Also slice 1 medium to large onion and chop 1 medium tomato and 1 green chili.
You will need about 3 cups of chopped mushrooms, 1/2 cup of thinly sliced onions and 1/3 cup chopped tomatoes.
Heat 2 tablespoons oil in a pan. Then add sliced onions.
Mix the onions very well and saute on a low to medium flame. For quick cooking of the onions, you can add a pinch of salt while sauteing them. Saute till they start to turn light golden.
Then add ½ teaspoon ginger-garlic paste.
Stir and saute till the raw aroma of ginger-garlic goes away.
Add the 1/3 cup chopped tomatoes and chopped green chilies.
Stir and saute till the tomato softens.
Then add 1/4 tsp turmeric powder, 1/4 tsp red chilli powder and 1/4 tsp garam masala powder.
Mix the spices with the onion-tomato mixture.
Now add the chopped mushrooms. Mix very well.
Then add salt as per taste.
Stir and saute mushrooms on a medium heat.
First the mushrooms will release a lot of water.
Continue to saute till all the water has evaporated.
When all the water has evaporated and the mixture has become dry, then switch off the flame. Add 2 tablespoons chopped coriander leaves. Mix again. Allow the mushroom stuffing to cool down at room temperature.