Irish Manhattan

I'm having a dinner party tonight!

I've got a great menu and a crazy bottle of wine to kick things off. But my booze supply is, well, largely depleted. I'm down to the weird stuff, and so we'll be drinking pre-batched cocktails, rather than giving people free rein to the bar. (Free rein to...what exactly? Green chartreuse, cherry eau de vie, some Cointreau, some absinthe?)

We'll kick things off with an Irish Manhattan--a Manhattan made with Irish whiskey.

1/4 cup Irish whiskey
1 1/2 tablespoons sweet vermouth
1 maraschino cherry

Stir over ice; garnish with cherry.