Step 1

Heat the water: Microwave 1 cup of water in a small, microwave-safe bowl for 3 minutes.

Step 2

Prepare the egg: While the water microwaves, prick the bottom (wider end) of the egg with a safety pin or thumbtack (to prevent the egg from exploding in the microwave).

Step 3

Microwave the egg: Place the egg in the bowl of hot water. Add more water if needed to completely cover the egg. Cover the bowl with a plate and microwave at 50 percent power for 4 minutes. Leave the egg in the hot water in the microwave for 2 minutes after the microwave stops.

Step 4

Cool and peel the egg: Carefully remove the bowl of water from the microwave. Drain and run the egg under cool running water. Crack and peel the egg.

Step 5

Mix and fill: Cut the egg in half lengthwise, from top to bottom. Remove the yolk to a small bowl and mash with a fork. Add the mayonnaise, mustard, salt, and pepper and mix with the fork until smooth. Use a spoon to transfer the filling to the cup of each egg white. Sprinkle with smoked paprika, if using.