Obst, German for Fruit
Oca, Italian for Goose.
Oeuf, French for Egg.
Offal, Variety meats such as liver, sweetbreads, tripe, etc.
Oie, French for Goose.
Oignon, French for onion.
Oignon brule - literally meaning "burnt onion," a culinary term for a half-peeled onion seared on a skillet.
Oliven, German for Olives.
Oregano brujo, Puerto Rican oregano that grows wild on the island.
Orly (a la), A French cooking term applied to fish that is battered, deep fried and served with tomato sauce on the side.
Oyster plant, Another name for salsify.
Ouzo - an anise-flavored, strong, colorless liquor from Greece.