I am not a food purist by any stretch. Not everything has to be from scratch and convenience foods can and do make everyone's life a whole lot easier when it comes to cooking. However, there are certain things you should not mess with and homemade lemonade is one of them. Simply put, store bought lemonade has never and will never taste as good as homemade. Don't fall for the "homemade" labels. This is my mother's recipe and it's about as simple as it gets. Once you try it, you'll kick …