Top with Irish whiskey, lime juice and ginger beer.
Garnish with a lime wheel.
Notes
For a non-alcoholic version: Swap the whiskey for a zero-proof alternative. You may also omit the whiskey entirely. Swap the ginger ale: Try a flavored ginger ale or make your own at home to fit your personal tastes. Ginger beer is also a fine substitute, though a bit spicier than ginger ale, which is sweet.