Combine ground sirloin and next 9 ingredients; shape mixture into a 14- x 8-inch loaf. Place on a lightly greased 15- x 10-inch jellyroll pan.
Brush top of meat loaf evenly with Mustard Sauce; pour Tomato Sauce evenly over meat loaf.
Bake at 375° for 1 hour or until loaf is no longer pink in center. Let stand 15 minutes; drain before serving. (Meat loaf will be soft in texture.)