My mother made my family meals almost every night for six weeks when I was on bedrest last year, and then brought me a bunch of meals for the freezer after I had the baby. Some of the *different* ones she brought were my favorites. She makes a very good simple sweet and sour pork. It wasn't fried by the way, and brought that with rice, carrots, and a dessert. She even tried an Indian dish, cause she knows I love Indian food. She brought hamburgers, and homemade mac and cheese one night. She went an hour away too another town to get us food from P.F. Changs
Did I mention I have the best mother in the world. I would maybe just ask if there was something particular they were in the mood for, and maybe list a few options. It is nice of you to do for them