Mix together ground beef, onion, green pepper, egg, salt, pepper, and crumbled bread slices.
Add ¼ to ½ cup of ketchup and mix.
Pour water into Instant Pot.
Place trivet in.
Shape meat mixture into a loaf, and set it on a piece of aluminum foil. *Foil sheet should be big enough that you can “make a loaf pan” around the meatloaf. Or use the Instant Pot Loaf Pan
Place loaf on top of the trivet.
Turn valve to sealing position
Cook on manual/high pressure for 25 minutes, and natural release for at least 10 minutes.
Use remaining ketchup to top meatloaf.
Finish in the oven/broiler if desired.