I grate it and freeze it and then take it out and use in a recipe without any preparation or draining. I know a guy who loves zucchini he says his mom likes to use the big ones and scoops it out and fills it with chili and bakes it. I suppose she puts cheese on top. He raves about it.
I like to take a regular size zucchini and cut in half long ways and put a slice of bacon, salt and pepper and onion slices on one half. Put the other half on top and wrap it in foil and bake it or grill it until it's soft. About 45 - 65 minutes @ 375 degrees. It is so good. So far everyone I've served it to loves it. You'll know it's done when it no longer rock hard.