Let's face it, lemon meringue is the best pie around. I make a lemon meringue pie at least once every winter, but I decided to switch it up this year and try this version from Martha Stewart, which is essentially a lemon meringue pie without the crust, flipped upside down so the meringue is on the bottom. This meringue is stiffer than what you would traditionally find atop a pie, more like a meringue cookie or a pavlova. Perhaps best of all, this pie is gluten free!