Spray the inside of a microwave safe mug with non-stick spray (you want to use a mug that holds at least 8 ounces). Add the cake mix, water, applesauce and diced strawberry to your mug. Stir the ingredients together until smooth.
Bake in the microwave at full power for 1 minute.
Allow to cool slightly before eating.
Garnish with whip cream and strawberries (and whatever topping you want, really!)