Put the 3 bulbs of peeled garlic in a medium saucepan with the butter.
Turn the heat to medium low until the butter melts.
Once the butter has melted, turn the heat to a very low simmer. Let simmer for about 45 minutes, keeping an eye on it the entire time. If the butter starts bubbling vigorously, turn the heat down.
When the garlic is golden brown and very fragrant, remove from heat. Let cool for 5 minutes.
Transfer to a blender or food processor and blend with the parsley, raw garlic, and a generous pinch of salt and pepper.
Preheat oven to 425 degrees F.
Slice the loaf of bread in half lengthwise and then slice each half into 2-3 inch slices.
Spread each piece with a thick layer of the butter.
Bake for 10-12 minutes, or until tops are browned and garlic butter is puffy.