01 - Combine calamari rings with buttermilk, salt, and pepper in a bowl. Cover and refrigerate for at least 15 minutes to tenderize.
02 - Heat olive oil in a saucepan over medium heat. Add minced garlic and sauté until fragrant, approximately 1 minute.
03 - Add crushed tomatoes, oregano, basil, sugar, salt, and pepper. Simmer uncovered for 10-15 minutes, stirring occasionally. Adjust seasoning to taste and set aside.
04 - In a shallow dish, combine flour, cornmeal, garlic powder, smoked paprika, and cayenne pepper until evenly blended.
05 - Heat vegetable oil in a deep fryer or large, heavy-bottomed pot to 350°F.
06 - Remove calamari from buttermilk, allowing excess liquid to drip off. Dredge rings in the flour mixture, ensuring complete and even coating.
07 - Fry calamari in small batches for 1-2 minutes or until golden brown and crispy. Avoid overcrowding the pot to maintain oil temperature.
08 - Remove fried calamari with a slotted spoon and drain on paper towels. Serve immediately with warm marinara sauce, fresh lemon wedges, and a sprinkle of chopped parsley.