Meatloaf with Mustard and Sour Cream Gravy

Name: Meatloaf with Mustard and Sour Cream Gravy
Ingredients: 3 strips bacon; 2 eggs; 1/4 cup ketchup; 2 tablespoons sour cream; 3/4 cup plain breadcrumbs; 2 tablespoons minced yellow onion; 2 cloves garlic, minced; Kosher and freshly ground black pepper; 2 Italian sausages, casings removed (mild or spicy); 1 pound 80/20 ground beef; Mustard and Sour Cream Gravy, recipe follows; 2 tablespoons butter; 1/2 onion, minced; 1 tablespoon all-purpose flour; 1 cup beef stock; 3 tablespoons sour cream; 1 tablespoon Dijon mustard; 1/2 teaspoon Worcestershire sauce; Kosher salt and freshly ground black pepper