Spread butter evenly on the bread slices.
Mix grated cheese, chopped green chilies, and onion in a bowl.
Add salt, black pepper, chili flakes, and oregano to the mixture.
Spread the cheese mixture evenly on the bread slices.
Place the bread on a preheated pan or oven tray.
Toast until the bread becomes crispy and the cheese melts completely.
Serve hot with ketchup or spicy dip.