01 - Submerge calamari rings in buttermilk and refrigerate for 15 minutes to ensure tender texture.
02 - Warm olive oil in a saucepan over medium heat. Sauté garlic for 30 seconds until fragrant. Add crushed tomatoes, oregano, basil, sugar, salt, and pepper. Simmer for 10–15 minutes, stirring occasionally. Adjust seasoning and keep warm.
03 - Combine flour, cornstarch, salt, pepper, and paprika in a shallow dish until evenly blended.
04 - Bring oil to 350°F in a deep fryer or heavy pan.
05 - Lift calamari from buttermilk, allowing excess to drip off. Press rings into flour mixture until thoroughly coated.
06 - Fry calamari in small batches for 1–2 minutes until golden brown and crispy. Avoid overcrowding to maintain oil temperature.
07 - Transfer fried calamari to paper towel-lined plate to absorb excess oil. Serve immediately with warm marinara, lemon wedges, and fresh parsley.