01 - Preheat oven to 400°F.
02 - Pat halibut fillets dry with paper towels and arrange in a lightly oiled baking dish.
03 - Combine melted butter, olive oil, parsley, dill, chives, and minced garlic in a small bowl, mixing thoroughly.
04 - Brush herb butter mixture generously over each halibut fillet, ensuring even coverage.
05 - Sprinkle fillets with sea salt, black pepper, and paprika if desired.
06 - Arrange lemon slices on top of and around the seasoned fish.
07 - Bake for 15–20 minutes until fish flakes easily with a fork and appears opaque throughout.
08 - Transfer to plates and spoon any remaining pan juices over the fillets before serving immediately.