Add teriyaki sauce and stir to coat all surfaces of the beef. Place in refrigerator and marinate for at least 1 hour.
Before preparing skewers, preheat broiler. Lightly grease a large broiler pan with non-stick cooking spray.
To assemble skewers: Remove beef from marinade. Spear beef and vegetables on each skewer as follows: 1 piece marinated beef, 1 mushroom, 1 piece marinated beef, 1 tomato,
Place on prepared broiler pan.
Broil 5 minutes on each side.
Tips
If using wooden skewers as opposed to metal ones, soak them in water while you are prepping. This step will prevent the wood from burning.