Add all the ingredients into a medium-size metal bowl and stir.
Pour the liquid into a large freezer bag, and place it in the freezer until frozen for approximately 4 hours.
When ready to drink, massage the freezer bag by hand until it’s a wet, slushy consistency. If it’s not breaking up, run the bag quickly under hot water, and massage some more.
Divide among four Old Fashioned or rocks glasses.
Garnish each glass with mint leaf and lemon wheel.