Preheat your oven to 400°F (200°C).

In a medium bowl, combine grated Parmesan, breadcrumbs, minced garlic, melted butter, olive oil, lemon juice, salt, and pepper. Stir until it resembles wet sand.

Line a baking sheet with parchment paper and place halibut fillets on it, spaced apart for even cooking.

Press the crust mixture onto each halibut fillet evenly.

Bake for 12 to 15 minutes until the crust is golden and the fish flakes easily with a fork.

Let rest briefly, garnish with parsley, and serve hot.