Preheat the 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. Mix thoroughly until it resembles wet sand.

Line a baking sheet with parchment paper and place the halibut fillets on the sheet, spaced apart and patted dry.

Press the garlic-parmesan mixture onto the top of each halibut fillet, forming a thick layer.

Bake for 12-15 minutes until golden brown and flaky with a fork.

Let it rest for a minute before serving, garnished with freshly chopped parsley.