Spaghetti and Meatballs

Name: Spaghetti and Meatballs
Ingredients: 1 pound ground beef; 8 ounces ground pork; 1/2 cup freshly grated Parmesan, plus more for garnish; 1/4 cup fresh flat-leaf parsley leaves, chopped; 1/3 cup fresh breadcrumbs (made from stale bread); 1/3 cup chicken stock, preferable homemade or low-sodium store bought; 1 1/2 teaspoons kosher salt; 1/2 teaspoon cayenne pepper; 2 large eggs; 2 cloves garlic, finely chopped; 1/2 medium yellow onion, finely chopped; 3 tablespoons extra-virgin olive oil, plus more for forming meatballs; 2 tablespoons extra-virgin olive oil; 2 celery ribs, chopped; 2 medium yellow onions, chopped; 1 large carrot, chopped; 3 cloves garlic, chopped; 2 bay leaves; 1 tablespoon tomato paste; One 28-ounce can chopped San Marzano tomatoes; 3 quarts chicken stock, preferable homemade or low-sodium store bought; 2 or 3 sprigs fresh thyme, tied together with cotton string; 1/2 cup fresh basil leaves, chopped; 1 pound spaghetti; Salt