What is cannibal sandwich?

Chef's answer
A "cannibal sandwich," considered a holiday favorite in the state, consists of raw ground beef on bread with sliced onions, salt and pepper. ... Ground beef should always be cooked to an internal temperature of 160 degrees Fahrenheit, health officials added.
Frequently asked Questions 🎓
The "cannibal sandwich" is made up of raw ground beef, typically seasoned with spices and onions, served on bread. The Wisconsin Department of Health Services issued a warning that eating raw meat sandwiches poses a threat for salmonella, E. coli, campylobacter and listeria bacteria.
A "cannibal sandwich," considered a holiday favorite in the state, consists of raw ground beef on bread with sliced onions, salt and pepper. But, "eating raw meat is NEVER recommended because of the bacteria it can contain," the Wisconsin Department of Health Services (DHS) said in a tweet on Saturday.
Regardless, cannibal sandwiches have been a holiday treat in German, Polish, and other European communities in Wisconsin since the 1800s, and health department authorities have stepped up their warnings about them in recent years. While unusual in mainstream American dining, many cultures eat raw meat.
A "cannibal sandwich," considered a holiday favorite in the state, consists of raw ground beef on bread with sliced onions, salt and pepper. ... Ground beef should always be cooked to an internal temperature of 160 degrees Fahrenheit, health officials added.
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