Preheat the oven to 200 degrees C. Slice the garlic head in half horizontally and place on a piece of foil. Drizzle with some olive oil and cover the garlic with the foil. Bake for 30 minutes until the garlic is soft. Reduce the oven temp to 180 degrees C. Let the garlic cool a bit and squeeze the soft garlic into a bowl with the butter. (Doing it clove by clove is a pain so just squeeze the head all in one and the garlic will drop out). Mix the garlic and butter, add the parsley and cheese and mix well.

Slice the bread (I slice it right through as I find it much easier to serve) and spread the mixture on each slice. Reassemble the bread, cover with foil and bake for 30 minutes until hot and melted right through.