1. Preheat your grill to medium-high heat. Toss the zucchini slices with the olive oil, garlic powder, onion powder, salt, and black pepper until well coated. Grill the zucchini for 3-4 minutes per side, or until it’s tender and lightly charred.

2. Season the steak generously with salt and pepper. Place it on the hot grill and cook for 4-6 minutes per side, depending on the thickness of the cut, until it reaches your desired doneness. Let the steak rest for 5 minutes before slicing it against the grain for maximum tenderness.

3. In a small bowl, mix together the sour cream (or Greek yogurt), Dijon mustard, and chopped fresh herbs. This creamy, flavorful sauce is the perfect accompaniment to the grilled steak and zucchini.

4. Start by dividing the cooked rice or mashed potatoes between your serving bowls. Top with the sliced grilled steak and the charred zucchini rounds. Drizzle the herbed sauce over the top, and garnish with additional fresh herbs if desired.