I got this from a Hunt's can awhile ago, and I have modified it to be SBD allowed.
2 tablespoons olive oil
2 packages boneless, skinless chicken breast
1 can (26 oz) of a low sugar garlic and onion spaghetti sauce (or make your own, as I do, because most jarred and canned sauces are full of crap)
1 can (6 oz) of sugar free tomato paste
1 package (6 oz) of sliced fresh mushrooms
1 tablespoon chopped fresh parsley
Heat oil in large skillet. Cook chicken until browned on both sides.
Stir together spaghetti sauce and paste in small bowl; spoon over chicken. Top with mushrooms.
Simmer, covered, over low heat 15 mins, or until chicken is no longer pink. Sprinkle with parsley.
Note: I would definitely shred some skim mozzarella and top it with that, or some parmesan. Probably would also saute onion and garlic in the oil.