1 pound hot Italian sausage (such as Johnsonville®)
1 small onion
chopped
1 (14.5 ounce) can diced tomatoes
1 (3.8 ounce) can sliced black olives
drained
¼ cup mild pickled banana peppers
diced
12 ounces whole milk
or more as needed
4 cups shredded Monterey Jack cheese
Methods :
Turn on a multi-functional pressure cooker (such as Instant Pot®) and select Saute function. Crumble sausage into the pot and cook for 3 minutes. Add onion and cook until sausage is browned and onion is soft and translucent, about 5 minutes. Add tomatoes, olives, and banana peppers. Stir to combine. Pour in milk and cook, stirring often, until heated through but without boiling, about 5 minutes.
Add Monterey Jack cheese and whisk continually until completely melted and smooth, about 5 minutes.