6 fennel bulbs—halved, cored and very thinly sliced on a mandoline
1 1/2 cups Parmesan shavings made with a vegetable peeler (3 ounces)
In a large bowl, whisk the olive oil with the lemon juice and season with salt and pepper. Add the fennel and toss to coat. Transfer the fennel salad to a platter, top with the Parmesan shavings and serve.