Set the Instant Pot on Saute while you prep all the ingredients so it starts to warm up.
Once everything is prepped, first pour in the diced tomatoes, water, and olive oil. Then add the rest of the ingredients to the pot and stir really well. You want to stir them really well now because you won't have another chance until it's finished cooking.
Once it's stirred well, put the top on the pot, and spin to lock it in. Then make sure the valve on top is set to "sealing".
Use the manual setting and set to 15 minutes. Wait a few minutes and it will turn on and start sealing the pressure. Wait until the timer reaches 0. (it takes a little while for the timer to start because it needs to reach a certain temperature)
When the timer reaches zero, use an oven mitt and turn the valve on top to "venting". It takes a couple minutes for the steam to release. When you don't hear anymore steam coming out, you can remove the top and serve! Be careful, the food is still very hot! Enjoy!