In a large bowl add in ground chuck, ground pork, parsley, garlic, pecorino romano, breadcrumbs, egg, ricotta, salt, and black pepper. Using your hands mix that together until incorporated but DON'T OVERMIX!
Line two baking sheets with parchment paper. Begin rolling the meat mixture into meatballs and arrange them on the baking sheet, leaving about 1 inch of space between each. Bake them in the oven at 400°F for 12 minutes. Once the meatballs are done, set them aside.
Heat up a pan with olive oil. Now, add in the partially cooked meatballs and quickly brown them on a medium-high heat for about 1 - 2 minutes. Once they are done, pop them into your homemade or store bought sauce and let them simmer in the sauce at a low heat for at least 30 minutes or all day. Serve as is or over pasta and garnish with freshly grated pecorino romano. Enjoy!