To make the ginger-lime simple syrup, combine the lime juice, sugar, and ginger in a small saucepan. Bring to a boil and then reduce to a simmer for 5 minutes. Strain out the ginger and set the simple syrup aside to cool.
Fill a shallow plate with salt. Run a sliced lime around the rim of each glass. Press the rim of the glass into the salt. Fill the salt rimmed glasses with ice.
Making one at a time, fill a cocktail shaker with ice*. Pour 2 ounces of tequila, ¼ cup of orange juice, and 1 tablespoon of ginger-lime simple syrup over the ice. Shake and pour into the prepared glasses. Garnish with a lime if you wish, serve and enjoy!
Notes
* If you don't have a shaker, you can add all of the ingredients at once in a large pitcher filled with ice to combine.
Recipe by at https://hapanom.com/ginger-lime-margarita/