Prepare dressing by combining lemon juice, olive oil, salt, and pepper.

Set the dressing aside.

Preheat grill to medium-high heat.

Grill zucchini for 2-3 minutes per side until tender.

Transfer grilled zucchini to a salad bowl.

Grill steak to desired doneness (medium-rare recommended).

Set steak aside to rest.

In the salad bowl, combine mixed greens, sliced radishes, grilled zucchini, sliced green onions, halved cherry tomatoes, sliced basil, and sliced cucumber.

Add a small amount of dressing to the salad and toss gently.

Arrange the salad mixture on two plates.

Slice the steak against the grain.

Serve the sliced steak over the prepared salad.

Serve the remaining salad dressing on the side.