Melt 4 tablespoons butter in a saucepan.
Whisk in 1/3 cup flour until smooth, then 1 1/2 cups whole milk.
Cook, whisking, 5 minutes.
Add 8 chopped cooked bacon slices, 1/2 cup grated Manchego, 1 chopped scallion and a pinch each of salt and nutmeg.
Chill. Form into 2-inch logs. Roll in flour, dredge in beaten eggs, then roll in panko breadcrumbs.
Fry in 360 degrees F vegetable oil, 3 minutes.