Hi and welcome to the forum.
I am not sure where you live, but at this time of year you can't go wrong with soup. As I mainly follow a vegetarian / vegan diet I am probably not a lot of help with main course suggestions and there are so many yummy desserts on the forum I just don't know where to start, however, I know a lot of my fellow forum members will be along very soon with loads of suggestions and ideas for you to check out.