Balsamic Beef Kabob Sandwiches

• 1/4 cup balsamic vinegar
• 1/4 cup olive oil
• 2 garlic cloves, minced
• 1 teaspoon dried rosemary, crushed
• 1/2 teaspoon pepper, divided
• 1/4 teaspoon salt, divided
• 1-1/2 pounds beef top sirloin steak, cut into 1/4-inch-thick strips
• 2 medium onions
• 8 naan flatbreads
• 2 cups chopped heirloom tomatoes

1. Mix first four ingredients; stir in 1/4 teaspoon pepper and 1/8 teaspoon salt. Toss with beef; let stand 20 minutes.
2. Cut each onion into eight wedges; thread onto metal or soaked wooden skewers. Thread beef strips, weaving back and forth, onto separate skewers.
3. Grill onions, covered, over medium heat until tender, 5-7 minutes per side. Grill beef, covered, over medium heat until desired doneness, 3-4 minutes per side. Grill flatbreads until lightly browned, 1-2 minutes per side.
4. Toss tomatoes with the remaining pepper and salt. Remove onion and beef from skewers; serve on flatbreads. Top with tomatoes.

balsamic vinegar, olive oil, garlic, rosemary, pepper, salt, beef, onions, flatbreads, heirloom tomatoes

Taken from www.tasteofhome.com/recipes/balsamic-beef-kabob-sandwiches/ (may not work)