Beef Sandwich

Preheat a small non-stick pan over medium heat. If you don't have one, add some oil.

In the meantime, slice the beef and add salt and pepper. Once heated, add the beef and cook each side for 4 minutes.

If you want, you can cover the pan once you flip it. Once ready, dice.

For the sandwich, cut the bread in half and add the beef.

Optional: Add some lemon juice or mustard.