My grandmother used to make this at Thanksgiving and Christmas to fill out the usual sweet potato casserole and dressing menu. This was always one of my favorites. It is very easy and very tasty! It is a good way to get your kids (and reluctant DH's) to eat their vegetables!
- Cook the frozen vegetables according to the package directions. Drain well.
- Combine cooked vegetables, onion, celery, cheese, and mayonnaise in a large bowl, stirring well.
- Spoon the mixture into a greased 11 x 7 x 1 1/2 inch baking dish.
- Combine cracker crumbs and butter. Stir well. Sprinkle crumb mixture evenly over the casserole. Bake at 350 degrees for 30 to 35 minutes or until thoroughly heated.