Preheat oven to 350 degrees Fahrenheit. Generously coat 8x4 inch loaf pan with cooking spray. In large mixing bowl, combine all ingredients except the ground beef and mix well with your hands. Once everything is combined, add the ground beef and mix thoroughly. Shape into a loaf in the prepared pan. Bake for 1 hour. Let stand 5 minutes before slicing.
Glaze top with ketchup if desired.