Heat the olive oil in the Instant Pot insert and add the sausage. Brown on all sides(about 2-3 minutes total) and set aside.
Add the onions and peppers to the pot and saute for 2-3 minutes.
Add the chicken stock and sausage and mix together.
Pour the tomato sauce over the top (don't mix it in) and pressure cook on high for 6 minutes.
Let the pressure release naturally for 10 minutes, then use the quick release to release any remaining pressure.
Serve hot alone or place on a bread to make a sandwich.
Notes
I use a 6 quart Instant Pot. If you have a smaller one, be careful not to overfill it.
While the cooking time is just 6 minutes on high in the Instant Pot, you’ll also need to factor in time for pressure to build and release.
Be sure to let the pressure naturally release for 10 minutes as the sausages will continue to cook during this time.
When you add the tomato sauce, just pour it on top of the sausages. If you mix it in, it may cause a burn error message on your Instant Pot.
Instead of tomato sauce, you can substitute it with pasta sauce or marinara sauce.
To prevent the sausages from splitting, you may want to pierce them with a fork before cooking them in the Instant Pot.
Cook the sausages to a safe internal temperature of 160F degrees. If your sausages contain ground turkey or chicken, they should be cooked to 165F degrees.
The recipe doesn’t include any seasonings as the sausages are flavorful on their own. If you prefer extra flavor, add a sprinkle of salt, garlic powder, Italian seasoning or some red pepper flakes.