3 potato crispy prosciutto oil Recipes

extra virgin olive oil (evoo), prosciutto , halved crosswise, leeks , trimmed halved lengthwise and cut crosswise 1/2 inch thick, salt and pepper, two 10- to 12-oz packages fresh potato gnocchi, butter, flour, milk, ground nutmeg , to taste, grated fontina (3 generous handfuls) or 1 cup fontina valle d aosta cheese (3 generous handfuls), grated asiago cheese, grated parmigiano-reggiano cheese

yukon gold potatoes, peeled and cut into 1/4-inch-thick slices, low sodium chicken broth, butter (1/4 stick), prosciutto, chopped and sliced, celery, chopped, chopped sweet onion (such as vidalia or maui), chopped fresh chives, truffle oil (or more ), fresh lemon juice