I was just in Paris last week and we went twice to this restaurant because it was so good. Les Viex Bistro right across the street from Notre Dame. Its small but the atmosphere is awesome and the food, incredible! The staff is fantastic as well. We even got free glasses of champagne and chocolates after dinner the second night we were there, compliments of the owner (I think because we told him how much we enjoyed the place that we decided to come again).

Out of all the places we ate at, this was my favorite.