Follow these steps to create your Rosemary Garlic Steak Kebabs:

1. Prepare the Marinade: In a bowl, mix together the olive oil, minced garlic, chopped rosemary, red wine vinegar, salt, and black pepper.
2. Marinate the Steak: Cut the steak into 1-inch cubes. Place the steak in a resealable plastic bag or a bowl and pour the marinade over the meat, ensuring all pieces are well coated. Seal or cover and marinate in the refrigerator for at least 30 minutes (or up to 2 hours for enhanced flavor).
3. Prepare the Vegetables: While the steak marinates, chop the bell pepper, red onion, and any additional vegetables you’d like to use.
4. Preheat the Grill: Heat your grill to medium-high heat.
5. Assemble the Kebabs: Skewer the marinated steak chunks and vegetables onto skewers, alternating between meat and veggies for a colorful presentation.
6. Grill the Kebabs: Place the skewers on the grill and cook for about 10-15 minutes, turning occasionally. Cook until the steak reaches your desired level of doneness (135°F for medium-rare).
7. Rest the Kebabs: Once cooked, take the kebabs off the grill and let them rest for a few minutes to allow the juices to redistribute.
8. Serve: Transfer the kebabs to a serving platter, garnish with fresh herbs, if desired, and enjoy!

These simple steps will have you preparing stunning Rosemary Garlic Steak Kebabs that are sure to impress.