1/2 cup milk
1/3 cup seasoned bread crumbs
2 teaspoons dried minced onion
1 teaspoon salt
1 1/2 pounds ground beef
1/4 cup ketchup
1 teaspoon ground mustard
1/2 teaspoon Worcestershire sauce
Combine egg, milk, bread crumbs, onion, mustard, ketchup, Worcestershire sauce and salt, in a large bowl. Crumble ground beef over mixture and stir well to combine. Shape into a round loaf; place in a 5-quart slow cooker.
Cover and cook on Low until a meat thermometer reads 160 degrees F (71 degrees C), 5 to 6 hours.
5 minutes before serving layer cheese slices over meatloaf let cheese melt slightly
Remove from crock pot and let sit for 5 minutes before cutting
Serve with bun, lettuce ad 1000 island dressing