Name this fruit (I think it's a fruit!)

So, the mister and I picked up our veggie CSA this weekend and found this item.  Our farmer has grown peaches and melons this year, so our veggie CSA is not "all veggies, all the time."  However, I'm a bit perplexed about this recent arrival.

It has the stalk of a pumpkin, but is very smooth skin like summer squash. That said, it also has the color of a honeydew--my cell phone picture does it no justice.  It's a soft, butter yellow color.  We have yet to cut into this, but I wonder if my curious readers can figure this out first.