MELT 1 tablespoon butter in small saucepan over medium heat. Stir in flour and cook, stirring often until smooth, about 1 minute. Slowly whisk in milk until combined. Simmer, stirring constantly, until sauce thickens, about 2 to 4 minutes. Stir in cheese until smooth. Season with salt, to taste. Remove from heat and set aside.
COOK your hot dogs your favorite way. We suggest pan-fried with butter! See how to cook the perfect hot dog. About 5 minutes before hot dogs are finished, add remaining butter, bell peppers and onions. Cook, stirring occasionally, until softened and lightly browned.
PLACE each hot dog in a bun and top with sauteed peppers and onions and cheese sauce.