vinegared appetizer
A small dish, often seafood or vegetables, dressed with vinegar and served as an appetizer or side dish in Japanese cuisine.
Today's vinegared appetizer is octopus in vinegar dressing.
Compound of 酢 (su, 'vinegar') and 肴 (sakana, 'appetizer' or 'side dish'). The reading すざかな is a straightforward combination of the two components.