1. 1. Preheat the grill to medium-high heat.

2. 2. Season the sirloin steak with salt, pepper, and your favorite steak seasoning.

3. 3. Grill the steak for about 4-5 minutes per side for medium-rare, or until desired doneness is reached.

4. 4. While the steak is grilling, heat a skillet over medium heat and add olive oil.

5. 5. Add chopped kale to the skillet and sauté until wilted, about 3-4 minutes.

6. 6. Add sliced zucchini to the skillet and cook until tender, about 3-4 minutes more.

7. 7. Season the kale and zucchini with salt and pepper to taste.

8. 8. Once the steak is done grilling, let it rest for a few minutes before slicing it against the grain.

9. 9. Serve the sliced steak with the sautéed kale and zucchini on the side.

10. 10. Enjoy your delicious grilled sirloin steak with kale and zucchini!