Separate prosciutto slices and lay flat on a cooling rack over a baking sheet pan. Bake until crisp, about 10 minutes. Let cool on rack. Crumble into bite-size pieces. Set aside.
Bring a large pot of well-salted water to a boil. Add the green beans and cook, approximately 2-3 minutes or until just tender. Remove beans with a slotted spoon and place in an ice water bath to cool. Drain beans into a colander.