In the Pressure Cooker, combine tomatoes, tomato sauce, tomato paste, water basil, garlic powder, Italian seasoning, and onions.
Add sausages to the sauce, and place the peppers on top of the sausage, but don't mix.
Lock lid in place and select high pressure, set the timer for 25 minutes and press start. Refer to your Pressure Cooker booklet for complete user instructions.