Combine and mix the four cheeses with the brandy and white wine in a large bowl. Brush olive oil on one side of each bread slice and turn over. Spoon cheese mixture evenly on 4 of the 8 bread slices. Top with remaining 4 bread slices, oiled side up.
Heat a large Teflon coated non-stick skillet over medium-high heat for 2 minutes. Put the sandwiches in the skillet (in batches if necessary) and cover and cook for 2 to 3 minutes, or until the undersides are golden brown and the cheese has begun to melt. Uncover, and turn the sandwiches with a spatula. Cook for 2 to 3 minutes or until the bread is golden brown and the cheese has melted. Turn once more and cook for 30 seconds. Remove from pan and let cool for 3 to 5 minutes. Cut sandwiches in half, rub the garlic clove over the top of each sandwich and serve.