California Black Bottom Pie

INGREDIENTS

• 1 cup finely chopped walnuts
• 1 cup graham cracker crumbs
• 1/4 cup white sugar
• 5 tablespoons butter, melted
• 1/4 cup cold water
• 1 tablespoon unflavored gelatin
• 3/4 cup white sugar
• 2 tablespoons cornstarch
• 1/4 teaspoon salt
• 2 cups milk
• 4 egg yolks, beaten
• 1 cup semisweet chocolate chips
• 2 teaspoons instant coffee granules
• 4 egg whites
• 1 dash cream of tartar
• 1/2 cup white sugar
• 2 tablespoons rum
• 1/2 cup heavy cream
• 8 walnut halves