In a shallow bowl, mix together the butter, lemon juice, garlic and thyme.
Toss each halibut fillet in the bowl, ensuring all sides are coated. Season with salt and pepper. Keep the leftover butter mixture to brush the halibut.
Preheat the smoker to 225°F and oil the grates to prevent the fish from sticking. Smoke the halibut for 45 minutes to 1 hour or until the internal temperature reaches 140°F, brushing with the butter mixture halfway through.
Notes
Use wild halibut when possible. It is healthier for you and just tastes better. Frozen halibut works fine too but just make sure it is thawed before cooking.
Use a mild wood for a subtle smoke flavor like alder, apple or cherry.
Prevent sticking by oiling the smoker grates before placing the halibut on it.
You know the fish is done when it flakes easily when pressed with a fork.