Zucchini?

Aaron from work was kind enough to bring me some of his harvest from his garden!  On the left are obviously baby tomatoes but in the middle, he claims, is a zucchini!  That is the LARGEST zucchini I have EVER seen if it is in fact one.  Anyone know what else this could be?  It has the coloring of an acorn squash, the shape of a gourd and the texture of a zucchini.  No joke, this thing ways at least 3-4 pounds.  Any suggestions on how to cook it?!  I was thinking about cutting it in half and baking it but I don't know what else to do with it!