01 - Place calamari rings in a bowl, cover with milk and 1 tsp salt. Let soak for 10 minutes to tenderize.
02 - In a shallow dish, combine flour, cornmeal if using, black pepper, paprika, and cayenne pepper.
03 - Heat vegetable oil in a deep pot or large skillet to 350°F (180°C) for frying.
04 - Heat olive oil over medium in a small saucepan. Add garlic and sauté for 1 minute. Add crushed tomatoes, oregano, red pepper flakes if using, sugar, salt, and pepper. Simmer for 10 to 15 minutes, stirring occasionally. Stir in fresh basil if desired.
05 - Drain calamari and pat dry with paper towels. Dredge rings in the flour mixture, coating thoroughly, then shake off excess.
06 - Fry calamari in batches for 1 to 2 minutes until golden and crispy. Avoid overcrowding the pan. Remove using a slotted spoon and drain on paper towels.
07 - Serve immediately with warm marinara sauce, lemon wedges, and chopped parsley.