We stopped at this place called Aux Merveilleux de Fred which specializes in flavourful meringues and brioche. (Note: they have a shop in NY!). They are amazing.
I took a photo of the Karl Lagerfeld store, but alas it was closed when we went back to check it out.
Let me explain about the radish sandwich. It was delicious. Butter bread, butter, sea salt and a radish shaped like a cocktail sausages rather than the round ones we get in the North America.