01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or lightly grease a casserole dish.
02 - Pat the halibut fillets dry with paper towels. Brush each fillet lightly with olive oil and season both sides with salt and pepper.
03 - Arrange the fillets in a single layer on the prepared baking sheet or dish.
04 - In a small bowl, mix together the softened butter, parsley, dill, chives, garlic, lemon zest, and lemon juice until fully combined.
05 - Spread half of the herb butter evenly over the tops of the halibut fillets.
06 - Bake for 15–18 minutes, or until the fish flakes easily with a fork and is opaque throughout.
07 - Remove from the oven and immediately top each fillet with the remaining herb butter to melt over the hot fish.
08 - Serve warm, garnished with fresh lemon wedges.