Lemon, herbs, and butter flavor this fancy fish dinner.
HEAT AND CUT: Adjust oven rack to middle position and heat oven to 450 degrees. Cut 4 large pieces of aluminum foil.
ASSEMBLE: Add thyme, lemon zest, salt, and pepper to bowl and stir with spoon to combine. Place 1 fillet on 1 side of each piece of foil. Sprinkle thyme mixture evenly over fillets and top with butter.