Good quality beef steak; trimmed of excess fat (and gristle & connective tissue if any). Cut meat into 1-inch cubes.

1 tablespoon olive oil
2 tablespoons minced yellow or white onion
2 tablespoons Worcestershire sauce
1-2 teaspoons hot pepper sauce (Such as Tabasco)
1 cup tomato sauce
1 rounded tablespoon prepared horseradish
Kosher salt and freshly ground black pepper
Optional: 1/2 cup vodka

In a small saucepan, over medium heat sauté onion in olive oil until translucent. If using vodka add it now and allow to simmer until volume reduces by about half. Stir in remaining ingredients, simmer for a minute or two then reduce heat. Taste for seasonings, and adjust if necessary. (Sauce can be served warm or at room temperature.) Cut meat into approximately 1-inch cubes. If you are going to pan sear them, no need to skewer meat, just salt and pepper the meat and cook in a hot pan, turning as the cubes become brown and done to your liking. Place on a warmed platter with skewers and dipping sauce in a small bowl alongside. To grill or broil, cut meat as directed above, skewer meat, salt & pepper and grill/broil until cooked the way you prefer. I place some dipping sauce on a warm plate/platter, arrange the cooked meat on top, with additional sauce on the side. A shower of minced parsley or chives brightens up the dish.