Preheat your oven to 400°F (200°C). Slice the top off the head of garlic, drizzle with olive oil, and wrap it in foil. Roast for about 30-35 minutes until soft and caramelized.

While the garlic is roasting, butter one side of each slice of bread. For a heartier texture, you can spread a thin layer of olive oil instead.

Allow the garlic to cool slightly, then squeeze the roasted cloves out of their skins into a small bowl. Mash them with a fork until smooth.

On the unbuttered side of two slices of bread, spread a generous layer of mashed garlic. Sprinkle a mix of your cheeses onto the garlic layer, then top with the other slices of bread, buttered side out.

Heat a skillet over medium heat. Once hot, place your sandwiches in the skillet. Cook for 2-4 minutes until the bread is golden and crispy, then flip and continue cooking until the cheese is melted.

Once the sandwiches are perfectly golden brown, remove them from the skillet. Let them cool for a minute before slicing in half—this allows the gooey cheese to settle just a bit.