1. Shave the zucchini and squash into thin strips using a vegetable peeler. Discard seeds. Place zucchini and squash in a medium bowl, and toss with salt.
2. Combine mint and next 4 ingredients (through pepper) in a small bowl; stir with a whisk. Pour over zucchini and squash; toss.
3. Heat a small nonstick skillet over medium heat. Add prosciutto; saute for 2 minutes or until crisp.
4. Place 3/4 cup salad on each of 4 plates. Top each serving with 1 tablespoon cheese; sprinkle evenly with prosciutto.