There are many types of pie in the world. In Britain they are hearty dinners. In the US they are mostly considered desserts. I happen to love pumpkin pie. Cherry pies are good too of they are not overly sweetened.
Pizza is is probably the most universally known pie. I like my pizzas without cheese (I'm vegan in addition to having a food sensitivity to dairy) and covered in vegetables. My favorite pizza is one with kale, avocado, and diced tomatoes on a homemade gluten free crust. A little basil is also good.
This entire blog is for the Pi day challenge.