Ius in Sarda (Sauce for Bonito) is a traditional Ancient Roman recipe for a classic sauce of pepper, oregano and mint with onion in an olive oil vinaigrette base that is intended to be served with sardines. The full recipe is presented here and I hope you enjoy this classic Ancient Roman version of: Sauce for Bonito (Ius in Sarda).
Pound together the pepper, oregano, mint and dried onion in a mortar. Add the chopped onion and pond to a paste. Turn into a bowl and whisk in the olive oil and vinegar.
Serve as a dressing or sauce for hot or cold sardines.