Place the cashews and garlic in a small pot and cover with water. Boil for 15 minutes, then drain completely. Place the cooked cashews and garlic in a food processor with olive oil. Process until a paste forms, about 1 minute.
Combine cashew paste with ground meats, Pecorino, parsley, eggs and some salt and pepper. Knead until well combined. Using a measuring cup, form into heaping 1/4-cup-sized meatballs.
Heat enough canola oil to come 1/2-inch up the side of a low-sided Dutch oven or heavy bottomed skillet to 350 degrees F. Add meatballs in batches and brown the meatballs on all sides until dark brown and cooked through, about 5 minutes a side. Let drain on a wire rack and serve with your favorite spaghetti and tomato sauce.