Mix the beef, sausage, onions, garlic, thyme, parsley, egg, Parmesan, breadcrumbs, ricotta and salt in a bowl together with your hands (like mixing play dough). Form 1 1/2-inch inch balls out of the meat mixture. Heat a large ovenproof skillet (preferably cast iron) with a bit of olive oil. Add the meatballs and brown on all sides, about 3 minutes. Place the skillet in the oven to finish cooking, 5 to 7 minutes.
Remove and toss with the red sauce. Place on the toasted slider buns and sprinkle with Parmesan and parsley.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
This recipe has been updated and may differ from what was originally published or broadcast.
Recipe courtesy of Domenica Catelli, owner of Catelli's, in Geyserville, CA