Place the bread crumbs, reserved chopped tentacles, grated Parmigiano/Pecorino cheeses, finely minced garlic, parsley, salt, pepper and an egg in a medium sized bowl. Use a fork or your fingers to combine well.
Stuff the calamari with the filling. Secure the open end with a toothpick. Set aside while you prepare the tomato sauce.
Stuff the calamari with the filling. Secure the open end with a toothpick. Set aside while you prepare the tomato sauce.