Italian Style Duck
["1 small onion, chopped", "1 c. sliced fresh mushrooms", "6 Tbsp. butter or margarine, divided", "1 can (29 oz.) tomato sauce", "1/2 c. grated Parmesan cheese", "1/2 c. minced fresh parsley, divided", "1 envelope spaghetti sauce mix", "1/2 c. all-purpose flour", "1-1/2 tsp. onion salt", "1-1/2 tsp. garlic salt", "8 boneless skinless duck breast halves", "1/2 c. shredded mozzarella cheese", "1/2 c. shredded cheddar cheese", "Hot cooked pasta"]
["In a saucepan, saute onion and mushrooms in 2 Tbsp. butter until tender. Stir in the tomato sauce, Parmesan cheese, 1/4 c. parsley and spaghetti sauce mix. Bring to a boil. Reduce heat; cover and simmer for 15 minutes, stirring occasionally."]
["onion", "mushrooms", "butter", "tomato sauce", "Parmesan cheese", "fresh parsley", "spaghetti sauce mix", "all-purpose", "onion salt", "garlic salt", "mozzarella cheese", "cheddar cheese", "pasta"]