1) Cooked 2) Cooked with onions 3) Kind of potatoes for simba 1) Cooked 2) Oniony 
• (a.) Applied to boiled potatoes cut into small pieces and heated in oil or butter. They are usually flavored with onion and parsley.
Ly`on`naise' adjective [ French lyonnaise , fem. of lyonnais of Lyons.] (Cookery) Applied to boiled potatoes cut into small pieces and heated in oil or butter. They are usually flavored with onion and parsley. 
green salad with cubed bacon and soft-cooked eggs, often served with herring and anchovies, and/or sheeps feet and chicken livers; specialty of Lyon; also called saladier lyonnais.potatoes sautéed with onions.
[adj] - cooked with onions
adjective cooked with onions
(of food, esp. fried potatoes) cooked with pieces of onion.