Add about 1/3 of the marinara sauce to the bottom of the Instant Pot.
In a mixing bowl, combine the ground beef & pork sausage with the spices. Mix thoroughly with clean hands. Roll the mixture into 1.5 to 2-inch meatballs, and add them directly to the bottom of the Instant Pot.
Pour the remaining marinara sauce over top of the meatballs, using a spoon to gently stir & coat them in the sauce.
Place & lock the lid, making sure the vent is set to "sealing". Set to Manual, on High pressure for 5 minutes.
Once finished, hit cancel and allow the pressure to release naturally for 10 minutes (allows the meatballs to finish cooking). Follow by a quick release to let out remaining pressure.
Top the meatballs with chopped basil or parsley & serve over roasted broccoli & cauliflower florets or spaghetti squash.
Notes
I double check that my marinara sauce is free of non-compliant oils (soybean primarily), any sort of dairy, and especially- sugar!