Avocado and Turkey Sandwiches with Feta Mayonnaise

1. To prepare mayonnaise, combine mayonnaise, feta, lemon juice and cilantro in a small bowl. Stir until well blended.
2. To prepare sandwiches, spread lemon mayonnaise on each slice of bread. Layer lettuce, turkey, bacon and tomatoes on 4 slices of bread.
3. Slice avocados and place on remaining slices of bread. Sprinkle with lime juice. Season with salt and pepper.  Close sandwich halves.