Just when you thought grilled Sirloin kabobs couldn't get better, this kabob recipe goes to new heights with a garlic rosemary butter sauce.
Cut potatoes into 1-1/2-inch pieces. Place in microwave-safe dish; cover with vented plastic wrap. Microwave on HIGH 6 to 8 minutes or until just tender, stirring once. Cool slightly.
Cut beef Top Sirloin Steak into 1-1/4 inch pieces. Combine beef, mushrooms, tomatoes, potatoes, olive oil, and steak seasoning in a large bowl; toss. Alternately thread beef and vegetables onto metal skewers.
Place kabobs on grid over medium, ash-covered coals. Grill, 9 to 12 minutes (over medium heat on preheated gas grill, 8 to 10 minutes) for medium rare (145°F) to medium (160°F) doneness, turning once and brushing with sauce during last 5 minutes. Remove from grill and brush with remaining sauce. Garnish with remaining rosemary, parsley mixture.
Test Kitchen Tips Thread steak pieces onto skewers leaving small spaces between them. Loose or tight spacing can cause beef to cook unevenly.