Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper or a silicone baking mat.
Prepare the squid: Clean and slice the squid into rings. Pat them dry with paper towels to remove excess moisture.
Make the coating: In a shallow bowl, combine panko breadcrumbs, grated Parmesan, garlic powder, onion powder, dried oregano, salt, and pepper.
Coat the squid: Dip each squid ring into the olive oil or melted butter, then dredge in the breadcrumb mixture, pressing lightly to coat evenly.
Bake: Place the coated calamari in a single layer on the baking sheet. Bake for 10-12 minutes or until golden brown and crispy.
Serve: Remove from the oven and optionally drizzle with lemon juice. Serve immediately with your favorite dipping