Step 1

Preheat the grill to 400ºF. Clean the grill grates or set a grill pan on the grill to heat up.

Step 2

Whisk 1 tablespoon of lemon juice, 1 tablespoon of olive oil, and ½ teaspoon of salt together in a bowl.

Step 3

Place the fish filet in a baking dish and pour the lemon juice mixture over the fish. Brush the marinade evenly into the fish and let marinate for 15 minutes.

Step 4

Use a hand mixer to whip the remaining salt with the butter, lemon zest, pepper, dill, and garlic until light and fluffy.

Step 5

Grease the grill grates or grill pan, and then transfer the fish to the pan skin side up. Grill for 2-4 minutes. Flip the fish and add 2-3 tablespoons of the butter mixture to the top of the fish. Grill for 2-4 more minutes or until the fish flakes easily with a fork. The internal temperature should be between 130ºF-135ºF. How long you grill the fish will vary depending on the thickness of the fish filet.

Step 6

Remove the fish from the grill and top it with flakey sea salt and fresh dill. Option to melt the remaining dill butter and use it as a dipping sauce for the fish.