Cut beef steak into 1-1/4-inch pieces. Combine seasoning ingredients in large bowl. Add beef, mushrooms and bell pepper pieces; toss to coat.
Alternately thread beef and vegetable pieces evenly onto eight 12-inch metal skewers, leaving small spaces between pieces.
Place kabobs on grid over medium, ash-covered coals. Grill kabobs, covered, 8 to 10 minutes (over medium heat on preheated gas grill, 9 to 11 minutes) for medium rare (145°F) to medium (160°F) doneness, turning once. Season kabobs with salt, as desired.
Meanwhile, combine sauce ingredients in small bowl. Serve with kabobs.
Nutrition information per serving: 276 Calories; 108 kcal Calories from fat; 12 g Total Fat; 4 g Saturated Fat; 5 g Monounsaturated Fat; 76 mg Cholesterol; 209 mg Sodium; 9 g Total Carbohydrate; 1.4 g Dietary Fiber; 30 g Protein; 2.2 mg Iron; 9.3 mg Niacin; 0.8 mg Vitamin B6; 1.3 mcg Vitamin B12; 5.5 mg Zinc; 39.3 mcg Selenium; 104.9 mg Choline;