Smelly high value treats that don’t contain poultry?

Hi all! I’m hoping you can help me come up with some ideas for high value treats that are super smelly but don’t contain any poultry. I need it for a scent training class I’m doing with my dog.

I’ve tried freeze dried salmon, but it wasn’t very smelly, and I don’t want to use anything overly processed like hotdogs.

Do you think cooked angus beef steak would be appropriate?

Thank you for your help!