In the bottom of a bowl, muddle the ginger, lime zest, and lime juice to combine. Stir in the grapefruit juice, syrup, and tequila, and pour the mixture over ice. A lime-salt rim would be an excellent addition.
I always have three kinds of hot sauce in my purse. I have a soft spot for making people their favorite dessert, especially if it's wrapped in a pastry crust. My newest cookbook, The Book on Pie, is out on November 10th, 2020.