After being disappointed by noglu in Paris, my hopes for an entirely df, gf patisserie were low. How wrong I was! Les Gasteliers was FANTASTIC. I had the Paris brest, and the crust was crusty, the cream was creamy, and the espresso I got was perfect. The hazelnut cream was almost too much, but sips of espresso broke it up and kept it from being cloying.
The person behind the counter was patient with my mediocre French, and spoke English well when I got stuck on 'for here or to go?'
The seating is extremely limited, but service is quick and polite.
They also sell a cookbook that's entirely gluten and dairy free, with some egg free as well. It's written in French of course, but I would recommend learning French just to have these pastries. The recipes included are pretty simple and don't require anything your average gluten free baker doesn't already have, like rice flour or a blender.
— Yes, the establishment is dedicated gluten-free
— Excellent