Preheat oven to 400°F. Lightly spray 6 medium muffin cups with cooking spray; set aside.
Combine:
Combine tomato sauce, brown sugar and mustard in small bowl; set aside.
Combine all remaining ingredients in large bowl. Add 1/4 cup reserved sauce mixture to meat mixture and mix in. Divide meat mixture evenly and place into prepared muffin cups. Place muffin pan on baking sheet.
Create:
Bake 25 minutes or until no longer pink in centers (165°F). Top each mini loaf with 2 tablespoons sauce; bake 5 minutes more or until sauce is set. Serve with remaining sauce.