Prepare the Calamari:
If using whole calamari, clean and slice them into rings. Pat them dry with paper towels to remove excess moisture. This will help them fry crispier.
Set up the breading stations:
In one shallow bowl, whisk together flour, cornstarch, garlic powder, paprika, salt, and pepper.
In another shallow bowl, beat the egg.
In a third shallow bowl, add panko breadcrumbs.
Coat the calamari:
Dip each calamari ring into the flour mixture, coating it evenly.
Next, dip it into the beaten egg, and then coat it in the panko breadcrumbs, pressing gently to make sure the breadcrumbs stick.
Heat the oil:
In a large, deep pan or Dutch oven, heat about 2 inches of oil over medium-high heat. The oil is ready when a small piece of bread or batter sizzles upon contact.
Fry the calamari:
Working in batches, carefully drop the breaded calamari rings into the hot oil. Fry for 2–3 minutes or until golden brown and crispy, flipping them halfway through for even cooking.
Remove the calamari with a slotted spoon and drain on paper towels.
Serve:
Garnish with chopped parsley and serve with lemon wedges and your choice of marinara sauce or aioli for dipping.