If you're just roasting tomatoes, don't add anything other than those. If making salsa you'll add the other items.
Preheat to 390F for 5 minutes. Thoroughly rinse the tomatoes, jalapeño, and cilantro and pat them dry. Arrange them in your air fryer basket so they aren't overlapping. Then set time to 10 minutes total.
At the 5 minute mark open the air fryer and carefully flip the ingredients. Once timer goes off, very carefully remove the tomatoes and garlic and set on a plate.
Leave the jalapeño and onion in the basket and set for another 3 minutes. This is to help them both soften more. When cooked allow to cool slightly.
Place the jalapeño, onion, garlic clove and salt in a food processor and pulse for a few minutes until you end up with smallish chunks. Next add the cilantro and tomatoes and again pulse until you have a slightly chunky salsa – you can make it as smooth or chunky as you’d like.