Place two slices bread on a plate and cover with gravy. Set aside.
Divide 1 1/2 tablespoons mayonnaise and 1 1/2 tablespoons grainy mustard even among two slices of bread and spread in a thin layer to coat.
Arrange lettuce on each slice and top with 1/2 cup turkey. Divide the sweet potato casserole evenly between the two sandwiches and spread to coat.
Top each sandwich with a gravy soaked "Moist Maker" and spread 1/2 cup stuffing on top of the bread.
Divide the cranberry sauce between to two sandwiches. Spread the remaining bread with the mayonnaise and mustard. Top each sandwich with the remaining bread.