Preheat oven to 350°F and spray 12 small ramekins with nonstick cooking spray. Place potatoes in a microwave-safe bowl; cover and microwave on HIGH for 6 minutes or until potatoes are tender.
Meanwhile, melt butter in a medium saucepan over medium heat. Stir in flour and cook for 1 minute more. Slowly stir in 1/2 & 1/2, cooking until mixture is smooth. Add cheeses, a little at a time, then stir in remaining ingredients.
Spoon into prepared ramekins and bake for 30 minutes or until lightly browned and bubbly.