I prefer the pre-cut watermelon you buy in a clamshell at your grocery store. I typically shop Kroger because they underwrite our recipes, and they have really good house brands. If you buy pre-cut watermelon, a medium clamshell container exactly fills a gallon-size freezer Ziploc bag. Otherwise, buy a watermelon and cut it up into about 1.5-inch cubes.
Fill the gallon freezer bag and then make sure that all the watermelon is laying flat; squeeze out the excess air. Lay it flat in your freezer for at least four hours to freeze. You may need to place it on a cookie sheet inside your freezer.
Use 2/3 of the bag to make three cocktails (about 20 watermelon cubes). Why three cocktails? Because one cocktail is not enough, and two is a little too much for me! I typically make these for me and a friend.
Add frozen watermelon into a high-powered blender. Add 1/2 cup TC Craft Reposado tequila (or reposado tequila of your choice), the juice of two limes, and 8-10 mint leaves. Let it blend for about a minute so that it is really smooth.
Serve immediately. You may want to serve with a spoon or a straw as it's pretty thick ... and oh-so-delicious!