Place the ground chuck in a large mixing bowl.
Remove casing from the sweet Italian sausages and add into the mixing bowl with the ground chuck. Discard the casings.
In a food processor, chop onions, celery, carrot and parsley until small. Add to the meat in the bowl.
Add the next 9 ingredients to the bowl and using your hands, mix well until all of the ingredients are incorporated.
Form 12 meatballs, 4 ounces each. To help you gage the size, you can use a 1/4 cup dry measuring cup. Roll them in your hands to make smooth, round balls.
Heat a large frying pan until hot. Add 1/4 cup of olive oil and heat for 30 seconds. Add the prepared meatballs.
Using a metal spatula, gently turn the meatballs every 30 to 45 seconds until all sides are brown.
Gently remove the meatballs and place them on a platter while you prepare the
Silky Marinara Sauce.