Hit SAUTE, and when it reads hot, add olive oil and then, add sausages
Cook for about 5 minutes or until brown on both sides
Remove sausages to platter, cut into thirds, cover, and set aside
Add a little water, if necessary to deglaze pot and scrape up browned bits, then add onions, and cook until slightly soft, stirring frequently
Stir in peppers, then hit CANCEL to turn pressure cooker off
Add cut sausages over onions and peppers, then top with undrained diced tomatoes, Italian seasoning, salt, garlic powder and pepper
Pour water around and over sausages, then add lid, and set vent to sealing position
HIt PRESSURE COOK for 5 minutes, and allow a natural release for 5 minutes. Then, do quick release, and when pin drops, open lid, and stir well
Use slotted spoon to remove sausage, peppers and onions and use for sandwiches. Or, serve as is or with pasta