Press the button SAUTÉ. Set it for HIGH, MORE, or CUSTOM 400°F and set the time for 10 minutes.
Mix the sausage, marinara, broth, and seasoning blend in an Instant Pot. Cook, stirring occasionally, until many wisps of steam rise from the liquid. Turn off the SAUTÉ function; stir in the bell pepper strips and ziti. Lock the lid onto the pot.
Option 1Max Pressure Cooker Press Pressure cook on Max pressure for 5 minutes with the Keep Warm setting off.
Option 2All Pressure Cookers Press Meat/Stew or Pressure cook (Manual) on High pressure for 6 minutes with the Keep Warm setting off. The valve must be closed.
Use the quick-release method to bring the pot’s pressure back to normal. Unlatch the lid and open the cooker. Stir in the shredded cheese. Set the lid askew over the pot and set aside for 5 minutes to melt the cheese and let the pasta continue to absorb excess liquid. Serve by the big spoonful.