In a medium pot, add 1 cup heavy cream, and cook over medium heat until bubbles appear at the sides of the pot. You do not need to bring to a boil.
Remove the cream from the heat, and add chocolate chips, stirring until a thick and smooth ganache forms. Return to heat in small increments if lumps remain.
Pour over the chilled crust and smooth out. Press toppings into the chocolate, then refrigerate at least 2 hours before serving. Serve with whipped cream or ice cream as desired.