Cut up both yellow and green peppers into squares of approximately 1 inch. Cut steak into 1-inch cubes. Set aside.

In a shallow baking dish, mix olive oil, soy sauce, vinegar, Worcestershire, and garlic. Whisk for a minute so everything is well combined.

Take all the kebab ingredients and start loading up the skewers. Start with a piece of steak, then cherry tomato, green pepper, steak, yellow pepper, etc.

Place loaded up skewers in a dish with marinade. Let it sit covered in the refrigerator overnight if possible.

When ready to grill, preheat your George Foreman Grill for at least 5 minutes with the lid closed. Use high setting if you have it.

Place kebabs on the grill and sprinkle with kosher salt. Close lid.

Let grill for about 3 minutes, depending on your grill. Give them a half turn and sprinkle with more kosher salt. Continue to grill another 2-3 minutes.