Preheat oven to 425 degrees F
Using either a nonstick cooking spray, or olive oil (1 t or so), grease a 9x12 baking pan
Add all ingredients (minus the jarred marinara) to a large bowl, and mix thoroughly until combined
Using an ice cream scoop, make evenly sized meatballs, you should have about 15
Bake meatballs for 20 minutes (uncovered), this helps to brown them
Remove meatballs, lowering heat to 325 degrees F, pour sauce over meatballs, ensuring they are evenly covered, place back in the oven for 45 minutes
Carefully remove from the oven (they will be hot), garnish with basil or fresh parsley, and serve as desired. My favorite is with baked spaghetti sauce ;)