Fried Dough with Prosciutto - Lidia

Ingredients

• One 3/5-ounce package fresh yeast or 1 package active dry yeast
• 1 cup warm (about 100 F) milk
• 1 tablespoon extra virgin olive oil
• 4 cups unbleached all-purpose flour, plus more for kneading by hand
• 1 teaspoon salt, plus extra for final salting
• 1 1/2 cups sparkling mineral water or club soda
• 3 cups vegetable oil for frying
• 12 thin slices prosciutto