Grilled Beef Kabobs with Peppers and Onions

Whisk the olive oil, lemon juice, garlic, oregano, cumin, salt, and pepper in a bowl. Add the beef cubes and marinate 30 minutes at room temperature or up to 8 hours refrigerated. 2. If using wooden skewers, soak them in water for 20 minutes. 3. Thread the beef, peppers, and onion onto skewers, alternating and leaving a little space between pieces so they cook evenly. 4. Heat the grill to medium-high. Grill the kabobs 10-12 minutes, turning every 3 minutes, until the beef is browned outside and still pink in the center. 5. Rest 5 minutes on the platter and serve with lemon wedges and chopped parsley.