Preheat your oven to 400°F (200°C).

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

Line a baking sheet with parchment paper and place the halibut fillets on it, ensuring they don't touch.

Press the crust mixture onto each fillet to form a thick layer about 1/4-inch deep.

Place the baking sheet in the oven and bake for 12-15 minutes until the crust is golden brown and the fish flakes easily.

Remove from the oven, let cool for a minute, and garnish with freshly chopped parsley before serving.