This recipe is adapted from Vegetable Harvest. Thinly sliced zucchini is tossed with balsamic vinegar, seasoned with fleur de sel and topped with shaved parmigiano reggiano. That's all there is to it, and it's a great flavor combination! The original recipe calls for the zucchini to be sliced thinly with a mandoline. I didn't feel like pulling out my mandoline to slice two zucchinis, so I shaved them with a vegetable peeler instead.