Preheat the broiler on your oven to 450°.
Slice the bread in half lengthwise, leaving a top and a bottom half. Separate the halves, cut side up, on a large baking sheet.
In a bowl, stir together the butter, garlic, parsley, and salt. Spread this mixture over both sides of the loaf.
Heat the garlic bread in the broiler for 3-5 minutes, until it is just starting to brown. (You need to watch it carefully; check it often the first time you make it.)
Remove the garlic bread from the oven. Slice it into strips.