Le Flore en L'Ile is one of the first places you'll see as you walk or drive to Ile St. Louis on the Quai Orléans, and like every place on the island, they serve Berthillon ice cream. If the line to Berthillon is too long, or it's after 8pm, you can enjoy your cone or cup on this lovely terrace with a view of the Seine. The line on the right was for scoops to go and the line was almost as long as the one at Berthillon.
If you are lucky enough to get a warm sunny day in Paris, take advantage of your treasure and spend some time soaking in the living street theater of life at a café like this one. Since this is a prime location, prices will be higher than places tucked away on a side street, but remember that you can sit all day for the price you pay and some people looked like they had spent the entire afternoon sipping their wine or coffee.
We came to the island for her to taste Berthillon ice cream, so she got 2 scoops with a caramel sauce, a tuile almond crisp, and whipped cream. This dessert cost 12€ ($16 US), which was more than our quiche, but she declared it was worth every Euro.
Just north of Ile St. Louis is the Marais neighborhood and I decided to introduce her to classic bistro at the Café des Musées. I loved their lamb, but after eating a substantial "snack" earlier, my friend and I both opted for the special fish of the day, a St. Pierre, simply grilled on a plancha, with cauliflower and watercress, served on a bed of tomatoes for 23€ ($28 US). It was a perfect summer dinner, and I drank a lovely generous glass of Chablis for under 6 € ($8 US).
My friend is a dessert lover, so she savored the thick rich chocolate terrine with two sauces for dessert, while I ordered another glass of wine for my dessert.
Sweet travel tip : a great way spend your first day in Paris is eating at least two desserts upon arrival:)