Mix together all ingredients for the meatballs in a mixer. Use a large scoop and then use hands to roll into packed meatballs. Make 24 large meatballs.
Spaghetti Sauce
In a medium bowl, combine the ingredients for the spaghetti sauce. Pour 1/3 of the sauce into the bottom of the Instant Pot.
Place meatballs on the bottom of the inner pot.
Pour the remaining sauce over the meatballs.
Gently stir together to coat the meatballs, being careful not to press together the uncooked meatballs.
Pour the 1/2 cup water overtop the sauce.
Close the lid on the pressure cooker and make sure the pressure valve is turned to Sealing.
Set a manual cook time for 10 minutes on high pressure.
Do a quick release when pressure cooking time has finished.
Serve over your choice of pasta noodles, or on an open-faced sandwich bun with melted cheese.
Serves 12 (2 meatballs each).
Notes
The calories shown are based on the recipe making 24 meatballs, with 1 serving being 2 meatballs. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate.