Ingredients
The following ingredients have 4 Servings
- 3 tablespoons unsalted butter
- 2 1/2 tablespoons all purpose flour
- 1 1/4 cups milk
- 1 1/2 teaspoons dijon mustard
- 1/2 teaspoon salt
- 6 ounces shredded sharp cheddar cheese
- 1 recipe easy roast beef, thinly sliced
- 3 sesame topped burger buns
