Pesto Mayonnaise: Mix mayonnaise and basil in small bowl until well blended. Refrigerate until ready to use.
Sandwich Build: Lay bread on flat surface. Spread 1 tablespoon Pesto Mayonnaise on bottom third of bread. Place 4 slices of bacon on top of pesto. Place 2 slices fresh mozzarella on top of bacon. Place 1 leaf lettuce on top of mozzarella. Place 2 slices tomato on top of lettuce. Fold sandwich over. Secure with a wooden toothpick.