Use a shallow rectangular baking dish, approximately 6 by 20 cm. Spray with non-stick butter flavored cooking spray. Line with wax paper cut to fit. Spray again with Pam, dust lightly with half of the powdered sugar. Set aside. Whip egg white until firm peaks form. Add sugar, vinegar and vanilla and whip until stiff peaks form, about 30 seconds to 1 minute more. Spread evenly in baking dish, and cook in microwave oven for 1.5 to 2 minutes on high. The meringue will stretch and spread while baking, but will shrink back to proper size while cooling, so don't panic! Cool meringue, and turn out onto wax paper that has been lightly dusted with the remaining powdered sugar. Spread with the tablespoon of whipped topping, top with the fruit and gently roll up. Garnish with small piece of fruit and mint leaves. Another dollop of whipped topping may be used on top with the fruit garnish, but if you do so, add another 10 to 14 calories to the total. Calorie Count: 100 calories. Fat: 1 gram. Total Preparation Time: 5 minutes! This is a pavlova even a non-dieter can enjoy, and it's QUICK.