eating in ancient Rome

If you were eating in a restaurant in ancient Rome, one thing certain to be on your table, besides no forks or spoons, would be a container of garum. Garum was a sauce made of fermented fish and strongly aromatic herbs. Recipe is linked. Twice (different ones). It was the ancient Roman equivalent of ketchup, and like ketchup, they put it on damn near everything.

Why am I linking this? I am researching life in ancient Rome. Why? Why not? Deep need to learn about it now.