Spanish cuisine a signal of piety. The arrival of Europeans in America, in 1492, initiated the advent of new culinary elements, such as tomatoes, potatoes, corn, bell peppers, spicy peppers, paprika, vanilla and cocoa or chocolate. Spain is where chocolate was first mixed with sugar to remove its natural bitterness. Other ingredients traveled to the Americas, such as rice, grapes, olives and many types of cereals. Many traditional Spanish dishes such as tortilla de patata (an omelette made with potatoes), would not be possible without the discovery of America. Gazpacho, salmorejo, and pan tumaca are made with tomatoes, which traveled from America
Vegetable oil of some pet foods. AAFCO defines vegetable oil, in this context, as the product of vegetable origin obtained by extracting the oil from seeds or fruits which are processed for edible purposes. Vegetable oils are also used to make biodiesel, which can be used like conventional diesel. Some vegetable oil blends are used in unmodified vehicles but straight vegetable oil, also known as pure plant oil, needs specially prepared vehicles which have a method of heating the oil to reduce its viscosity. The use of vegetable oils as alternative energy is growing and the availability of biodiesel around the world