Add the sweet potatoes to a wide mug or small bowl with 1 tablespoon water and microwave until tender, 2 to 5 minutes. Stir in the chicken, paprika and salt and pepper to taste. Microwave until warmed, about 1 minute. Carefully crack the egg on top. Sprinkle a little water on top of the egg and microwave until the egg white is solid but the yolk is still runny, 30 seconds to 1 minute. Serve immediately with toppings of your choice.