Add 2 cups of water to the inner pot in the Instant Pot.Place the steamer basket with the potatoes and the eggs into the inner pot.Lock on the lid and set the valve to sealing.Press the manual or pressure cook button and set for 4 minutes on High Pressure.Once finished cooking, do a Quick Release.After the steam has been fully released and the float valve is completely down, take off the lid. Test the potatoes for doneness with a fork. They should be soft and easily pierced.
Remove the steamer basket. Using tongs, place the eggs into a bowl of cold water to cool. Once cooled, peel then chop the eggs.
Combine the chopped eggs, chopped onion, mayonnaise, mustard, salt and pepper (celery seed, optional) in a large bowl. Mix till thoroughly combined.Gently fold in the potatoes being careful to not break any cubes.
Cover the bowl and place in the refrigerator. Chill the potato salad a minimum of 4 hours. Overnight is best.Before serving, sprinkle paprika over the top of the potato salad.
Store potato salad in a covered container in the refrigerator for up to 3 days. Keep potato salad chilled while serving. See notes for additional information.
Notes
If left out for more than two hours at room temperature, the potato salad should be thrown away.
The potato salad should not be left out more than one hour if the temperature is over 90℉.
If you plan on taking this on a picnic or other outdoor gathering, keep it sitting on a bowl of ice. Or another method of keeping it chilled.
Always check the silicone seal on your Instant Pot lid. Make sure it is seated properly and isn't loose. This is essential for your Instant Pot to cook effectively.