Grilled Steak & Potato Kebabs Recipe

Ingredients

• 2 cups fresh mint leaves
• 1 cup fresh parsley leaves
• ½ cup extra-virgin olive oil
• 2 cloves garlic
• 2 Tbsp. each red wine vinegar and fresh lemon juice
• 1 ½ tsp. ground sumac or minced lemon zest
• 1 shallot
• 1 tsp. red pepper flakes
• Salt and black pepper to taste
• 6 red or yellow new potatoes, ends removed, cut into 24 (½-inch-thick) slices
• 4 Tbsp. olive oil, divided
• 1 ¼ lb. beef tenderloin or top sirloin, cut into 2-inch chunks