Pat the steak dry and season both sides generously with salt, pepper, garlic powder, and onion powder. Let it rest at room temperature for about 15–20 minutes before cooking so it grills evenly. This small step helps keep the meat tender and juicy.
Combine sour cream or yogurt, Dijon mustard, chopped herbs, salt, and pepper in a bowl. Stir until smooth and creamy, then refrigerate to let the flavors blend. A chilled sauce adds a refreshing contrast to the warm steak.
Slice zucchini and toss with olive oil, salt, and pepper. Grill for about 2–3 minutes per side until tender with light char marks. Avoid overcooking so they stay firm and flavorful.
Heat the grill or pan over medium-high heat and cook the steak about 3–4 minutes per side for medium-rare, or longer to your liking. Let the steak rest for 5–10 minutes before slicing against the grain. Resting locks in juices for maximum tenderness.
Start with rice or mashed potatoes in each bowl, then add grilled zucchini and sliced steak. Spoon the creamy herb sauce over the top and serve immediately. Every layer adds flavor and comfort.