If it's 3pm and you're starving and you feel like eating crêpes for lunch, head to Breizh café. For normal hours, I recommend reserving a table! I like to go for a classic, like fromage, or saumon-crème fraîche but everything is delicious. Definitely leave room for dessert, as the apple, caramel & ice-cream crêpe is one of the most amazing things to exist.
Le Pain Quotidien
I've yet to be disappointed by Le Pain Quotidien. I know, a chain of restaurants. What can I say? I love their menu, their ingredients, their healthy choices, and their not-so-healthy but incredible Brunette praline nut butter. This is one of the only times I allow myself to eat loads of bread! woohooo! There are quite a few around Paris, and seeing as they are open all day, it's a good place to eat if you're starving and every other place is closed.