SINFULLY RICH NONFAT FUDGE SAUCE 1/2 c. granilated sugar 1/4 c. unsweetened cocoa powder 1 tbsp. plus 1 tsp. cornstarch 1/2 c. evaporated skim milk 2 tsps. vanilla extract assorted fresh fruit unfrosted cake or frozen nonfat yogurt, optional In a small saucepan, combine sugar, cocoa and cornstarch; stir in evaporated milk. Cook over low heat 3 minutes, ot until the mixture boils, stirring constantly with a whisk. Continue cooking 1 to 2 minutes longer, or until sauce is thickened and smooth, stirring constantly. Remove from heat; stir in vanilla. Serve warm or cold with fresh fruit, cake or nonfat frozen yogurt. Cover and refrigerate leftovers. Makes 7 servings. Calories.....80 per 2 tbsps. Fat.....0 g.....Fib.....0 g.