If you're often caught unawares and you need to take a dish to a potluck, keep a few staples at hand. One easy recipe is lemonade pie.
2 graham cracker pie crusts 9"
14 oz can sweetened condensed milk
8 oz container whipped topping
6 fluid ounce can lemonade concentrate (slightly thawed)
Mix condensed milk and lemonade (yellow or pink) together, fold in whipped topping and pour into pie crusts.