Tired of PB and J? Had it up to here with ham and cheese? In honor of back-to-school season, we revisit and remix the lunchbox, with sandwiches that surprise, but don't require you to break a sweat.

Melissa Clark leads us in our journey. The author of "In the Kitchen with A Good Appetite: 150 Recipes and Stories About the Food You Love," she also shares her mother's sandwich theory of life.  (Recipes after the jump)