Peeled and chop the onion and mince the garlic.
Seed and finely dice the red bell pepper and finely dice the tomatoes.
Set the Instant Pot to Sauté, add the olive oil, then add the ground beef or lamb, chopped onion, minced garlic, and diced bell pepper.
Sauté for 2–3 minutes, stirring to break up the meat, until starting to brown.
Add the diced tomatoes and all the dried seasonings; stir to combine.
Cancel the Sauté function, secure the lid, set the valve to Seal, select Manual/Pressure Cook and set for 15 minutes.
When cooking finishes, perform a quick pressure release, then remove the lid and use Sauté to simmer briefly until excess liquid evaporates to your liking.
Serve topped with chopped cilantro and chopped spring onion.