Chop all the vegetables (except the spinach) into same size pieces, about ½ in (1.25 cm).
Place the stainless steel inner pot inside the Instant Pot®. Press SAUTÉ and set time to 6 MINUTES. Sauté the onion, carrot, bell pepper, a bit of olive oil, and the condiments.
When the time is up, add all the other ingredients (except the spinach).
Close and lock the Instant Pot® lid. Make sure the steam release handle is turned to Sealing. Press Pressure Cook, pressure level High, and set time to 6 Minutes.
When the time is up, release the pressure naturally for 10 minutes and then do a quick release.
Coarsely chop the spinach and add directly to the pot. Let the heat from the food cook it.