Heat a frying pan over medium heat.

Add the butter and once it melts, crack the egg over top.

Sprinkle with salt,sliced onion and pepper.

Cook until the egg turns white and opaque.

Flip the egg. Once flipped, Place the tortilla on top. Cook for 1 minute.

Gently flip the egg over so the tortilla is now on the bottom of the pan

Cover with a lid and cook for another minute.

Slide the tortilla egg onto a plate, cover and roll it.Then serve!!!