1/3 cup diced onion
3 Tbsp sugar
3 Tbsp vinegar
2 1/2 cups water
2 cups small pasta
1 tsp salt
3/4 cup mayo or Miracle Whip
1 Tbsp mustard
1/4 tsp celery seed
salt and pepper
1/2 cup chopped celery
2 oz cheddar, diced
Mix together the onion, sugar and vinegar and set aside.
Put the water, salt and pasta in the Instant Pot and give it a stir. Close the lid, make sure the valve is set to Sealing and push the Pressure Cook (or Manual) button. Adjust time using the + and - buttons to get to 5 minutes. When it beeps that it's done, flip the valve from Sealing to Venting for a quick release and when the pin drops, remove the lid. Drain the pasta and rinse under cold running water. Drain well and set aside.
Whisk together the mayo, mustard, celery seed, salt and pepper. Add the onion/vinegar mixture and pour over the pasta. Add the celery and cheese cubes and stir well. Refrigerate for several hours to develop the flavour.