*1 cup cubed cooked ham can be substituted for bacon.
1. Preheat oven to 350°F. Lightly grease shallow 1-1/2-quart casserole.
2. Cook pasta according to package directions; drain and return to saucepan.
3. Melt butter in 2-quart saucepan over medium-low heat. Whisk in flour, salt, mustard and pepper; cook and stir 1 minute. Whisk in milk. Bring to a boil over medium heat, stirring frequently. Reduce heat and simmer 2 minutes. Remove from heat. Add cheese; stir until melted.
4. Add cheese mixture and bacon to pasta; stir until well blended. Transfer to prepared casserole. Bake, uncovered, 20 minutes. Arrange tomato slices on casserole. Bake additional 5 to 8 minutes or until casserole is bubbly and tomatoes are hot.
Macaroni & Cheese with Bacon
