Instant Pot Ketchup Meatloaf

Create the meatloaf: Combine ground beef, bread crumbs, finely chopped onion, diced apple, beaten egg, garlic powder, salt, and pepper in a large bowl until everything is well incorporated.

Form the beef mixture into a loaf shape and position it on a large sheet of aluminum foil. Fold the foil upwards to create a makeshift loaf pan, encasing the meatloaf.

Place 1/2 cup of water into a pressure cooker and position the steam rack inside, with its handles facing upwards. Carefully place the meatloaf on top of the rack. Close and secure the lid; seal the vent according to the manufacturer's instructions. Set the pressure cooker to high, following the manufacturer's guidelines; set a timer for 25 minutes. Allow 10-15 minutes for the pressure to build up.

Position an oven rack about 6 inches away from the heat source and preheat the oven's broiler.

Release the pressure cooker slowly using the quick-release method, following the manufacturer's instructions - this should take around 5 minutes. Remove the lid and carefully transfer the meatloaf to a baking sheet, still on the rack.

Place the meatloaf under the broiler in the oven until it's nicely browned, taking about 5 minutes.

Simultaneously prepare the topping: Mix ketchup, mustard, and brown sugar in a small bowl.

Brush the meatloaf with the topping mixture and return it to the oven for another minute or two, until caramelized.