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
Rudolf Hamburger recorded is restricted to his address and one or two basic personal details. This may have reflected the sensitive nature of some of the relevant sources. Ministry for State Security files on Hamburger refer to information held by the Party Central Committee or "elsewhere", without spelling out more detail, beyond the high level statement that he was "active in the anti-fascist movement" and had been accepted for membership by the Party Central Committee. Rudolf Hamburger was accepted as a full party member in March 1958. Rudolf Hamburger made his home in Dresden. Important projects he directed while employed by the