1. In a bowl, mix together the bread crumbs, cheeses, parsley, garlic, egg, salt, and pepper to make the filling.
2. Stuff the calamari with the filling mixture and secure the ends with toothpicks.
3. In a pan, heat olive oil and sauté garlic and red pepper flakes. Add tomato passata and salt, then simmer for 5 minutes.
4. Add stuffed calamari to the sauce, cover, and cook for 15-20 minutes until calamari is tender.
5. Serve over cooked pasta and enjoy!