Hamburger and Sonic also rely heavily on hamburger sales. Fuddruckers and Red Robin are hamburger chains that specialize in the mid-tier "restaurant-style" variety of hamburgers. Some restaurants offer elaborate hamburgers using expensive cuts of meat and various cheeses, toppings, and sauces. One example is the Bobby's Burger Palace chain founded by well-known chef and Food Network star Bobby Flay. Hamburgers are often served as a fast dinner, picnic or party food and are often cooked outdoors on barbecue grills. A high-quality hamburger patty is made entirely of ground (minced) beef and seasonings; these may be described as "all-beef hamburger" or "all-beef
Hamburger burger uses ground venison from deer. A "veggie burger", "black bean burger", "garden burger", or "tofu burger" uses a meat analogue, a meat substitute such as tofu, TVP, seitan (wheat gluten), quorn, beans, grains or an assortment of vegetables, ground up and mashed into patties. A steak burger is marketing term for a hamburger claimed to be of superior quality. or, in Australia, a sandwich containing a steak. Steak burgers are first mentioned in the 1920s. Like other hamburgers, they may be prepared with various accompaniments and toppings. Use of the term "steakburger" dates to the 1920s in the United