In a large bowl, combine the ground chuck and next 8 ingredients, mixing well. In a small bowl, combine the ketchup and mustard. Stir 1/4 cup ketchup mixture into meat mixture, reserving remaining ketchup mixture.
Press meat mixture into a 9x5x3-inch loaf pan, or shape into a loaf and place on a rack in a broiler pan. Spread remaining ketchup mixture over loaf. Bake 40 minutes. Top with French fried onions; bake 10 to 15 minutes, or until meat is no longer pink.