Parsnip Leek And Potato Gratin With Pecan Crumble is a comforting and flavorful dish that combines the sweetness of parsnips, the mild onion flavor of leeks, and the creaminess of potatoes. Topped with a crunchy pecan crumble, this gratin is a perfect side dish for any meal. The combination of flavors and textures creates a delicious and satisfying dish that will please both vegetarians and meat lovers.