A poutine made with an onion ring base rather than the typical pomme frites base.
Originated from Alto Restaurant on Avenue du Parc during the great winter carnival of '14.
Thought to have first been ordered by a clan of McGill scholars clad in forest green.
"Bonjour/Hi, I'd like to order the best poutine on the menu!"
"Oh! You must mean the Catherine poutine!"