Bob'S Chocolate Pie
["1 pkg. chocolate chips", "4 Tbsp. heavy cream *", "4 egg yolks (one at a time)", "4 egg whites, beaten stiff (add some sugar to sweeten; optional)", "1 tsp. vanilla", "1 baked (8-inch) pie shell", "whipped cream for garnish"]
["*Buy 1/2 pint whipping cream.", "Use 4 tablespoons for filling and the rest for topping."]
["chocolate chips", "heavy cream", "egg yolks", "egg whites", "vanilla", "pie shell", "whipped cream"]