Cook the orzo pasta according to package instructions. Season the pasta water with plenty of salt. Drain and rinse the pasta under cold water. Toss with a little oil to prevent the orzo from sticking to itself.Set aside
Cut the ends off the zucchini and cut lengthwise into quarters. Brush the zucchini and corn cobs with avocado oil, season with salt and pepper, and grill on a grill or grill pan over medium-high heat until the outside has grill marks. Roughly 4 minutes per side.
In a large bowl, add all the ingredients for the lemon dressing. Whisk until well combined. Then add the orzo, tomatoes, basil, corn, and zucchini.Toss gently to dress the salad.
Top the salad with crumbled feta cheese and more basil, optional.Serve chilled. Best eaten within 3 days of making.