Empty the limeade concentrate into a pitcher. Add 2 1/2 cans of water. Add 18 ounces, or 2 1/4 cups cans of tequila (or a bit less, if you don’t want your drinks to be quite as strong).
Hull the strawberries, slice lengthwise, and add to the pitcher.
Crumple the basil a little in your hands or muddle it a bit (this will help the basil flavor release into the drink) and add it to the pitcher, too.
Place the pitcher, covered, in the fridge overnight, or for at least four hours. (We drank after about 20 minutes and were still delicious)
When you remove the pitcher from the fridge, your margaritas will be a lovely pale pink color. Serve over ice and enjoy!
Makes 1 pitcher, or about 8 servings