1/2 c. low calorie Italian salad dressing
1/4 c. soy sauce
1/4 c. finely chopped onion
1 tsp. dry mustard
4 to 6 chicken breasts

Remove skin from chicken breasts. Mix Italian dressing, soy sauce, onion and mustard together. Pour mixture over chicken. Cover with foil. Bake 40 to 45 minutes at 400 degrees. Uncover and cook until brown.