Mix all ingredients except ketchup. Spread mixture in an ungreased loaf pan, 8 ½ x 4 ½ x 2 ½ or 9x5x3 inches, or shape into a 9x5-inch loaf in an ungreased rectangular pan, 13x9x2 inches. Spread ketchup over top.
Insert meat thermometer so the tip is in the center of the loaf. Bake uncovered 1 hour to 1 hour 15 minutes or until thermometer reads 160 degrees F.