01 - Pat calamari rings dry with paper towels, then place them in a bowl. Add buttermilk, season with salt and pepper, toss to coat, and let rest for 10 minutes.
02 - Heat olive oil over medium heat in a small saucepan. Sauté minced garlic for 30 seconds until fragrant. Add crushed tomatoes, oregano, basil, sugar, salt, and pepper. Simmer uncovered for 10 to 15 minutes until slightly thickened, stirring occasionally. Keep warm.
03 - In a shallow bowl, combine flour, cornmeal, paprika, garlic powder, and cayenne pepper.
04 - Lift calamari rings from buttermilk allowing excess to drip off. Dredge evenly in the flour mixture and shake off excess.
05 - Heat vegetable oil to 350°F in a deep fryer or heavy-bottomed pot. Fry calamari in batches for 1 to 2 minutes until golden and crisp, avoiding overcrowding. Remove with a slotted spoon and drain on paper towels.
06 - Arrange crispy calamari on a serving platter. Garnish with lemon wedges and fresh parsley. Serve immediately alongside warm marinara sauce for dipping.