Mett or Hackfleisch is a german delicacy.
It's raw meat and regulated under the Hackfleischverordnung.
( That's a german law - no joke )
The meat can only be sold fresh, or has to be thrown out after 24 hours.
I would only buy it at a trusted butcher.
If you ever travel to Germany and you like meat, you should try Mett.
This is Gewürzmett;
additional pepper and fresh onions.
Served on a bun.
Have a great day !