Add the lime slice to your favorite copper mule mug and muddle the fruit to release the juice.
Combine the Triple Sec and Tequila with the lime and marinade the mixture for 5 minutes or so.
Fill the mug with ice and stir.
Add 4-5 ounces of your homemade Ginger Beer slowly and stir it into the mix. Garnish with a lime peel if desired.