In the pot of the Ninja Foodi or Instant Pot, add in the pasta along with the water.
Stir in the pepper, onion, olives, pepperoni, pizza sauce, tomato sauce, and Italian Seasoning, DO NOT stir in the cheese, reserve the cheese for topping.
Be sure the water is covering the pasta so that it is all under the water.
Close the lid and seal the nozzle.
Manual pressure on high for 6 minutes.
Quick-release immediately when it's done, if this isn't done immediately the pasta can get mushy.
Serve topped with cheese and add garlic salt to taste.
Let it cool for about 5 minutes before serving to thicken up.
Notes
The gluten-free pasta we prefer for this is Barilla or Skinner Rotini.This works well with an additional add-in of cooked sausage too.The recipe was updated to add in seasonings.