Step 1

Create an ice bath in a large bowl using ice and a little cold water. Nestle a smaller bowl in ice bath.

Step 2

Place chocolate and water in a small pot and heat over medium. Whisk until mixture is melted and smooth, about 3 to 5 minutes.

Step 3

Immediately pour melted chocolate into the bowl in the ice bath. Vigorously whisk chocolate mixture by hand until thick, 3 to 5 minutes. The chocolate should be fluffy and form a mound when dolloped with the whisk (it should generally have the texture and appearance of mousse). If the mixture does not thicken, add a bit more chopped chocolate and remelt over the heat. Spoon into serving bowls and garnish with fleur de sel.