What to do with cauliflower and cabbage?

Cauliflower and cabbage are not my favorite veggies.  I love cole slaw and I love fried cauliflower, but beyond that they're just okay.  My family feels the same way.  We had a whole bunch of frozen cauliflower and cabbage that we needed to use up.  This dish was a huge hit for everyone.  Celia even had thirds!  So now I have a third way to serve these veggies that everyone loves.
Au Gratin Cauliflower & Cabbage
Ingredients:
4 to 5 Cups of Cooked Cabbage, Chopped
1 to 2 Cups of Cooked Cauliflower, Chopped
1/2 Cup Mayonnaise
1 Egg
1/2 Cup Milk
1/4 Tsp Dill Weed
1/2 Tsp Onion Powder
1/4 Tsp Salt
Large Squirt of Mustard
1/2 Cup Shredded Parmesan or Roman Cheese
2/3 Cup Shredded Cheddar Cheese
1/3 Cup Bread Crumbs

1. Preheat oven to 350 degrees.  Put cabbage and cauliflower in a large baking dish or bowl.  In a separate bowl, mix together mayo, egg, milk, dill, onion powder, salt, mustard and parmesan cheese. Pour over cabbage and cauliflower and mix.
2. Bake for 20 minutes. Spread cheddar cheese and bread crumbs over top.  Broil for 5 to 7 minutes until cheese has melted and bread crumbs have browned.