Turn Instant Pot to the saute function and add 1 tablespoon of oil. When the oil is hot, add the rye berries and stir to coat with the oil. Saute for about 5 minutes or until the rye berries are toasted and just starting to make popping sounds.
Add 4 cups of water to the Instant Pot, being careful of any steam. Stir. Lock lid in place and set vent to sealing. Turn off saute feature and use manual to set time to 25 minutes at high pressure.
After time is up, let pressure release naturally, this may take about 25 minutes. When valve drops, open lid. Drain off any excess water. Stir rye berries in refrigerator for 3-4 days.