Understand that by "extremely hardy" I mean it won't die even when no one waters it or tenderly cultivates the soil, and it comes back year after year, even when it is accidentally mowed or trampled by children playing at Indian wars. I heard it will even survive a nuclear holocaust.
Actually, I didn't hear that, but I suspect it's true.
Anyway, we like to put the fragrant, fresh tasting leaves to good use. After rinsing them well, (remember the trampling?) we put them in our iced tea and lemonade.
The kids even make their own "mint tea" by adding them to cups of water and stirring in a spoonful of sugar.
Our favorite thing to do with them, though, is make chocolate covered mint leaves. After they have dried from the careful rinsing (there's that trampling factor, again) we just dip them in some melted chocolate chips and lay them on wax paper to dry.
We put the extras in the freezer and pull them out to impress company by garnishing desserts with them.