What most naturally follows?

How to make tapa
Slice the beef into thin, pinky-width slices.
You want to cut against the grain. To cut against the grain, look at the long horizontal strands that run through the steak and cut perpendicular to them.
Don't be afraid to leave a little fat on the beef, it will help it cook later. Mix the vinegar, soy sauce, pepper, and garlic in a bowl.