Yes, if you want to skip the oven, you can easily use a pressure cooker to cook the meatballs. Insert the trivet into your pressure cooker.  Add 1 cup of water.  Add the meatballs to the pot.  You can layer them on top of each other. Cook for 15 minutes. Use a quick release to release the pressure. Make the sauce on the stove and add the meatballs at the same point in the recipe.