The trick that many people use for cutting cakes neatly also works well for meringues - keep a tall container of very hot water at your side as you cut the pie, and dip the blade of your knife into the water before every cut to keep the meringue from sticking.
Can fresh eggs be frozen for later use (out of the shell, of course)? The best buys in eggs are in a package of 18. For two people, it’s a long time to keep ...