Although homemade meat loaf is delicious right out of the oven, some say it's even better the next day. Martha likes to put several slices of her leftover meat loaf between 2 pieces of thick whole-wheat or Pullman bread, creating a simple yet hearty sandwich.
Begin by cutting the meat loaf into medium-thick (approximately 1-inch) slices; cut 2 slices per sandwich. Spread mayonnaise on a piece of bread, and lay the meat loaf slices on top. Add some lettuce and 1 or 2 slices from a beefsteak tomato. Spread more mayonnaise, mustard, or homemade tomato jam on the other slice of bread, and place it on top. No reheating is necessary; just cut the sandwich in 1/2, and enjoy