Slice off the very tip of the garlic bulbs to expose all the cloves, then drizzle with olive oil.

Individually wrap the garlic in foil and place in the oven at 180C/350F for 45-60 minutes, or until knife tender and caramelized.

Leave the garlic to cool for a few minutes, then peel away the outer layers and squeeze out the garlic onto a chopping board. Sprinkle with salt and mash with a fork.

Spread one side of each slice of bread with butter and the other side with roasted garlic. Top four slices with cheese, then place another slice on top, butter-side-up.

Add to a pan over medium heat and fry both sides until crisp and golden, with the cheese gooey in the center. You may need to do this in batches.