Beef Kabobs with Dijon Relish

Preheat grill on medium-high. In a medium mixing bowl whisk together mustard, olive oil, red wine vinegar, 1/2 teaspoon salt, 1/4 teaspoon black pepper; mix in 1/2 cup chopped red onion and parsley. Set aside. In a rimmed sheet pan drizzle olive oil over beef, broccoli, peppers, and remaining red onion, chopped into 1-inch cubes; toss until well coated and season generously with salt and black pepper. Skewer meat and vegetables alternately. Place skewers on grill and cook, rotating as needed until meat and vegetables are browned; 5 minutes Transfer skewers to a large platter and serve with dijon-onion relish.