Cut beef steak into 1-inch pieces. In large bowl, whisk together marinade ingredients; add beef, bell pepper and mushrooms, tossing to coat. Alternately thread pieces of beef, bell pepper and mushrooms on each of four 12-inch metal skewers.

Place kabobs on rack in broiler pan so surface of meat is 3 to 4 inches from heat. Broil 8 to 10 minutes for medium rare to medium doneness, turning occasionally. Season with salt, if desired.