This appetizer is so simple and elegant. The layers of bread, mozzarella, tomato, and basil stack up for one tasty morsel! Perfect for the vegetarian at your gathering. You can prepare the ingredients in advance, then assemble as guests arrive.
Slice baguette on the diagonal into 24 slices — save ends for another use. Broil until lightly toasted. Rub each slice with garlic clove as soon as they come out of the oven. Cut mozzarella into 24 pieces, about ½ inch thick and sized to cover bread. Slice each tomato into 6 slices.
To assemble: place baguette slice on platter, top with mozzarella then tomato, salt and pepper to taste; then top with basil leaf and drizzle with balsamic vinegar. Serve immediately.