OK. I was thinking the foie gras mi-cuit.

Thanks for the advice, annhig and plafield.

Our food needs are definitely simpler than the OP's for sure. A nice little bistro with a glass of wine is enough. And we won't be eating pastries for lunch every day.

Breakfast is included at our hotel, so I'm hoping to have a decent croissant in the morning.

As for getting around Paris, we are definitely desultory tourists, not biting off more than we can chew (figuratively). If we hit the Louvre, d'Orsay, Notre Dame, perhaps Sacre-Coeur, and spend time wandering around the 5th and the Marais (with probably a trip to the Eiffel Tower (we have a thing about Gustaf Eiffel having seen several of his bridges), we will be fine.

Weather may not be conducive to boulangerie-style lunches, and we have a normal hotel room, no kitchen.

And we're older, so our pace is slow. Lots of time to smell the roses. This trip is a prelude to our Nile cruise, so we don't want to get too exhausted.

Thanks again to the OP. One comment about the empty restaurant--if the food was good, it's a noble thing to stay and support them--I wonder why the place was empty.