It's dinner time!

Ingredients

• 1 pound bacon
• 4 (1 pound) loaves sourdough bread
• 8 ounces processed cheese, sliced
• 1 pound sliced cooked roast beef
• 1 pound sliced smoked ham
• 8 ounces sliced American cheese
• 2 sticks butter, sliced
• 1 cup Dijon mustard
• 1 cup mayonnaise
• 4 cups canned gravy, or to taste