* Crush Ritz Crackers to crumbs. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++ Preheat oven to 325 degrees F. Mix cracker crumbs and baking powder. Beat egg whites stiff, then very gradually add sugar, continiuing to beat. Add vanilla. Fold egg whites and crackers together. Put in a buttered 9-inch pie plate. Arrange pecans across top. Bake 30 minutes. Remove from oven, Sprinkle with shredded chocolate, then put under the broiler for a few seconds, watching closely so that the chocolate melts but does not scorch. Serve with ice cream or whipped cream.