A question about a recipe: Polenta baskets with sautéed spinach and Taleggio cheese

I have a question about step 4 on the recipe "Polenta baskets with sautéed spinach and Taleggio cheese" from Babette's Feast. It says:

"Put the polenta baskets on a baking tray lined with parchment papper and lightly brush them with olive oil."

Will the baskets stick o the paper, or will I have to oil the bottom first?