Place the trivet into the inner pot.

Pour 1 cup water into the inner pot.

Cut squash in half (either lengthwise or widthwise work fine)

Use a spoon to remove seeds and inner strings.

Place squash on the trivet.

Place lid on the pot and close the valve.

When it beeps that it is done, do a quick release by carefully opening the valve.

After pressure is gone, remove the lid.

Using a fork, scrape the inside of the squash to make your spaghetti.

Serve how you wish.