Melt the butter and add chopped onions, chopped mushrooms, green chilli, and a pinch salt.
Fry till mushrooms become a bit browned and shrinks.
break an egg into a bowl and add salt to taste.
Beat the eggs well and pour the egg over the spread onion mushroom mix on the pan.
swirl the pan to coat the egg all over.
place a slice of egg on one side and put the flame low.
once the top part gets cooked, fold the omelet over the bread. fold it again lengthwise into two.
serve it hot!