I slice long way and then spray with butter spray from WM. sprinkle with flour and cornmeal. A little sea salt and put them under the broiler. When brown turn and repeat.....
No grease......We make the zucchini boats all the time......
There is also a recipe for Mock Apple Pie using Zucchini.....try the yellow squash, much better.....you don't have to peel the yellow squash........