This needs some zipping up. Adding 1/4 tsp curry powder and a tsp or two of lemon juice to the liquids would help it immensely.
Easy to assemble doesn't mean it should be bland.
I liked the suggested apple dessert. We have liked a faux Waldorf salad made with apples, celery, walnuts, all in bigger chunks with a few raisins with lemon yougert to bind for a lighter taste after similar casseroles. The crunch is good with it.