Cut the top 1/4 inch off of garlic head. Drizzle with olive oil and sprinkle with salt. Wrap in aluminum foil and roast for 40 minutes or until the cloves are browned and tender. Once cool enough to handle, remove the cloves with a fork and mash.
Combine garlic and remaining ingredients except bread, in a bowl to make the spread. Note: You can make this a couple of hours in advance. Just place it in the refrigerator and remove about 5 minutes before you want to use it.
Reduce oven heat to 350 degrees.
Place french bread on prepared baking sheet.
Spread cheese mixture on top. Return to oven, cook 15 minutes or until cheese melts.
Allow to cool a couple of minutes before slicing. Serve immediately.