01 - Heat olive oil in a small saucepan over medium heat. Add minced garlic and sauté for 1 minute, until fragrant. Add crushed tomatoes, oregano, basil, chili flakes, and sugar. Season with salt and pepper. Simmer uncovered for 10–15 minutes, stirring occasionally, until slightly thickened. Remove from heat and stir in fresh parsley.
02 - Rinse the squid rings under cold water and pat dry with paper towels. Place the squid in a bowl and pour over the buttermilk. Toss to coat and let marinate for 10 minutes.
03 - In a separate bowl, combine flour, cornmeal, garlic powder, paprika, black pepper, and salt. Mix well to distribute spices evenly.
04 - Heat about 2 inches of vegetable oil in a deep pot or fryer to 350°F. Maintain temperature throughout frying for optimal crispiness.
05 - Remove squid from buttermilk, allowing excess to drip off. Dredge rings in the flour-cornmeal mixture, shaking off excess. Fry calamari in batches for 1–2 minutes, until golden and crispy. Do not overcrowd the pot. Transfer to a paper towel-lined plate to drain. Season with extra salt if desired.
06 - Arrange the crispy calamari on a serving platter with lemon wedges and warm marinara dipping sauce on the side.