Creating rosemary garlic steak kebabs is straightforward if you follow these steps:

1. Prepare the Marinade: In a large bowl, whisk together olive oil, minced garlic, chopped rosemary, soy sauce, balsamic vinegar, salt, and black pepper.
2. Marinate the Beef: Add the beef sirloin cubes to the marinade, ensuring they are fully coated. Cover the bowl and refrigerate for 1 to 2 hours.
3. Soak the Skewers (if using wooden skewers): If you’re using wooden skewers, soak them in water for at least 30 minutes to prevent burning on the grill.
4. Prepare the Veggies: Cut bell peppers and onions into even squares if you plan to include them.
5. Preheat the Grill: Heat your grill to medium-high heat, ensuring it’s ready before adding the kebabs.
6. Skewer the Ingredients: Thread the marinated beef onto skewers, alternating with pieces of bell pepper and onion as desired. Leave a little space between the pieces for even cooking.
7. Grill the Kebabs: Place the skewers on the hot grill. Cook for about 15-20 minutes, turning occasionally, until the beef is cooked to your desired level of doneness.
8. Rest the Kebabs: Once cooked, remove the kebabs from the grill and let them rest for a few minutes to allow the juices to redistribute.
9. Serve Warm: Your delicious rosemary garlic steak kebabs are now ready to be enjoyed!

With these easy steps, you’ll have flavorful kebabs that are sure to impress!