Nun'S Revenge - cooking recipe

Ingredients

1/2 cup half-and-half, plus
2 tablespoons half-and-half
1 teaspoon arrowroot
1 tablespoon sugar (or to taste)
2 ounces bittersweet chocolate, chopped (at least 70 percent cacao)
2 -4 slices orange zest (to garnish)

Preparation

In a small bowl, combine 2 tablespoons of the half-and-half with the arrowroot, whisking until smooth.
Place the remaining 1/2 cup of half-and-half in a small saucepan over medium heat.
Bring to a simmer and when the half-and-half begins to bubble around the edges, whisk in the sugar.
Whisk in the arrowroot mixture until the half-and-half thickens slightly, usually less than a minute.
Remove from the heat and quickly whisk in the chocolate until smooth.
Pour into cups, top each with a piece of orange zest, and serve immediately.