Chocolate pizza is a type of pizza prepared using chocolate as a primary ingredient.
 Various styles and preparation techniques exist.
 Chocolate pizza may be prepared as a dessert dish, as a savory dish, and as chocolate molded in the form of a pizza.
 Some companies specialize in chocolate pizzas.
Many regional variations of pizza the United States have been developed, many bearing only a casual resemblance to the Italian original.
 Pizza became most popular in America after soldiers stationed in Italy returned from World War II.
 During the latter half of the 20th century, pizza in the United States became an iconic dish of considerable popularity.
 The American slang terms "za" and "slice" can also refer to pizza.
 The thickness of the crust depends on what the consumer prefers; both thick and thin crust are popular.
 Often, foods such as barbecued chicken and bacon cheeseburgers are used to create new types of pizza.
Gino's Pizza and Spaghetti is a restaurant chain with 40 locations, most of them within the U.S. state of West Virginia.
 The company was founded by Kenney Grant in 1961.
 Many locations are shared with Tudor's Biscuit World although the Gino's brand is exclusive to West Virginia.
 There is one located in Ohio, while there are stand alone Tudor's locations in eastern Kentucky, southern Ohio and southwest Virginia.
 Gino's serves pizza, spaghetti, sandwiches, and more.
 Company headquarters are located in Huntington, West Virginia and Nitro, West Virginia.
Pizza al taglio or pizza al trancio (Italian for pizza by the slice — literally "by the cut") is a variety of pizza baked in large rectangular trays, and generally sold in rectangular or square slices by weight, with prices marked per kilogram or per 100 grams.
 This type of pizza was invented in Rome, Italy, and is common throughout Italy.
 Many variations and styles of pizza al taglio exist, and the dish is available in other areas of the world in addition to Italy.
The Old Spaghetti Factory is an Italian-style chain restaurant in the United States and Canada.
 The U.S. restaurants are owned by OSF International, based in Portland, Oregon, while the Canadian restaurants are owned by The Old Spaghetti Factory Canada Ltd.
 In 2003, the U.S. company alone had 45 restaurants, in 14 states and Japan, and sales of $105 million.
 The U.S. firm also operated an Old Spaghetti Factory in Hamburg, Germany, from 1983 to 1993, but that was its only European location.
Pizza Factory Inc. is a chain of pizza restaurants in the western United States, based in Oakhurst, California.
 The company began in 1979, when Danny Wheeler and his wife Carol opened Danny's Red Devil Pizza in Oakhurst.
 Ron Willey and his wife Joyce subsequently opened a second location in 1981, known as Pizza Factory.
Rosati's Pizza is the second largest local chain of restaurants in the Chicago metropolitan area, (behind only Portillo's).
 The Rosati's Pizza franchise now consists of 158 locations with 25 being Rosati's Pizza Sports Pubs.
 Rosati's locations offers Chicago Deep Dish, Thin Crust, Double-Dough Pizzas, Calzones, a variety of pastas, sandwiches, salads, desserts along with catering.
The Chicago Pizza Pie Factory was a chain of pizza restaurants.
 The chain originated in Crown Passage (off Pall Mall) as The Chicago Pizza Pie Factory and was started by entrepreneur Bob Payton in 1976-7.
 The London establishment also had a bar.
 This was the start of a series of restaurants forming the My Kinda Town chain.
 The chain opened restaurants in places such as Paris and Barcelona, where they operated successfully for several decades.
 The Paris site now houses a Burger King.
Gino's East is a Chicago-based restaurant chain, notable for its deep-dish pizza (sometimes called Chicago-style pizza), and for its interior walls, which patrons have covered in graffiti and etchings.
 The restaurant features deep-dish pizza baked in cast-iron pans, as well as sandwiches, soups and salads.
Tudor's Biscuit World is a restaurant chain based in Huntington, West Virginia, most commonly found in West Virginia.
 Many West Virginia locations share a building with Gino's Pizza and Spaghetti, although the chain is more extensive than Gino's (which is exclusive to West Virginia), having locations in southern Ohio, eastern Kentucky, and southwestern Virginia.
 In 2016 a franchise was opened in Panama City, Florida.
 Tudor's serves biscuits, biscuit sandwiches, homestyle breakfasts and dinners, muffins, and several side dishes.
 The chain was originally based in Charleston, West Virginia and many of the biscuit sandwiches are named for sports teams of interest in that area, including teams at Marshall University, West Virginia University, and The University of Charleston.

Question: What dish do both Gino's Pizza and Spaghetti and the Pizza Factory both make?
Answer: Pizza