Heat oil in a pan. Add garlic and saute them until the raw aroma of the garlic disappears.
Add the green chilies next and saute.
Next, add in the button mushrooms and saute for 1-2 minutes.
Add the onions and bell peppers next and mix well. Saute for 2-3 minutes.
Add the seasonings next and mix well.
Next, add in the tomato sauce, soy sauce, vinegar, sugar, and lemon juice. Mix well.
Simmer the mixture for 3-4 minutes.
Garnish with chopped parsley and serve hot.