Ricky and Lyn's Sweet and Sour Chicken (a la Carol)

My niece, Lyn, and her husband, Ricky, have a delicious sweet and sour chicken recipe. After making it a few times, I felt I no longer needed to look at the recipe. I could make it from memory. After I had the sauce mixed, I realized it didn't look like it usually does. I checked the recipe. Oops! For some reason I thought the recipe contained mustard and I had already added some mustard to the sauce, but mustard was definitely not in the recipe. So I accidentally came up with a new recipe - because adding the mustard made it better than ever. So here is the recipe - with my own touch:

Ricky and Lyn’s Sweet and Sour Chicken a la Carol

8 boneless chicken breasts (I use frozen chicken tenderloins)

1 8-ounce jar peach or apricot preserves

1 8-ounce bottle Catalina dressing

2 envelopes onion soup mix

1/4 cup prepared Dijon mustard

Mix all ingredients except chicken breasts. Place chicken in casserole dish. Pour mixture over the chicken breasts. Bake covered for 1 hour at 350 degrees. Remove cover and bake an additional hour.

I serve it over rice.