Combine the butter, garlic, lemon juice, parsley, and black pepper in a small mixing bowl. Stir to blend well. Spread both halves of the bread with the mixture. Put the halves together, wrap in a sheet of aluminum foil, and place on the barbecue pit or in an oven at 350°F to heat.
Yield: 1 large loaf; 6 to 8 servings