Preheat oven to 350°F.
Line bottom and sides of 15 x 10-inch jelly-roll pan with foil.
Generously spray bottom and sides of foil with nonstick cooking spray.
Combine milk, eggs, flour, butter, salt and white pepper in medium bowl.
Beat with electric mixer at medium speed until well blended.
Pour into prepared pan.
Bake 10 minutes.
Sprinkle with red pepper and prosciutto.
Continue baking 8 to 10 minutes or until eggs are set, but not dry.
Immediately sprinkle with cheese and basil.
carefully roll up omelet, using foil to gently lift omelet from pan.
serve as desired.