Heat a 6-quart Instant Pot
to "saute" mode. Once the indicator shows "hot" pour the olive oil in the pot. Then place the ground mild Italian sausage in the Instant Pot. Use a wooden spoon to break up the meat. Cook for about 5 minutes or until brown. Then add in the onion, bell peppers, and garlic. Mix well and cook for an additional 5 minutes.