Combine Marinade ingredients in a food-safe plastic bag. Add beef Top Sirloin Steak cubes; turn cubes coat. Close bag securely and marinate in refrigerator 30 minutes.
Add wood chunks, chips or pellets to smoker according to manufacturer's instructions. Preheat smoker to 225°F.
Remove cubes from marinade; discard marinade. Place cubes in smoker according to manufacturer's instructions. Set timer for 10 to 15 minutes depending on desired smoke flavor.
When cubes are done smoking, carefully remove from smoker. Thread cubes, onions, tomatoes and olives evenly onto eight 12-inch metal skewers, leaving small spaces between pieces.
Cooking Tip: Any large pitted olive variety may be used.
Place skewers on grid over medium heat. Grill, 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 with salt, if desired. Top skewers with cheese, as desired.
Nutrition information per serving: 2 skewers: 293 Calories; 148.5 Calories from fat; 16.5g Total Fat (6.5 g Saturated Fat; 0.2 g Trans Fat; 0.6 g Polyunsaturated Fat; 4.1 g Monounsaturated Fat;) 71 mg Cholesterol; 954 mg Sodium; 8 g Total Carbohydrate; 1.5 g Dietary Fiber; 25 g Protein; 0 mg Calcium; 1.7 mg Iron; 488 mg Potassium; 0.1 mg Riboflavin; 6.4 mg NE Niacin; 0.6 mg Vitamin B6; 1.2 mcg Vitamin B12; 195 mg Phosphorus; 4.1 mg Zinc; 24.7 mcg Selenium; 86.3 mg Choline.
This recipe is an excellent source of Protein, Niacin, Vitamin B6, Vitamin B12, Zinc, and Selenium; and a good source of Potassium, Phosphorus, and Choline.