Lay the bread slices on a baking sheet lined with parchment. Brush each side with a little olive oil. Broil for 1 minute or so, until the bread is toasty. Flip the slices and return to the broiler for another minute. Rub the tops of the bread slices with the cut sides of the garlic, and top with cheese. Return the cheese toast to the broiler and cook for another 2 to 3 minutes, until the cheese is bubbly and just turning brown. Watch it closely so that it doesn’t burn. Cut off the crusts – or not – and cut the toasts into triangles or rectangles, whatever shape looks like the most fun to dip into the soup!