The moment I heard about a new cookbook that allows to prepare your favourite delicacies from as few as three ingredients, I couldn't believe that something like that is even possible. On a daily basis, when I'm preparing recipes, I'm trying to concentrate on ingredients which are simple and available at most local stores (I admit that it's not so simple!). When I opened Sara Rainey's cookbook, ,,Three Ingredient Baking", for the first time, I immediately thought about all the…