Step 1

Spread a thin layer of mayonnaise over one side of each white-bread slice. Heat a skillet (preferably cast iron) over medium-high; add white bread, mayo-sides down, and reduce heat to medium-low.

Step 2

Cook, undisturbed, until a crisp, golden-brown crust forms, about 2 minutes. Transfer bread to a cutting board or plate, toasted-sides down.

Step 3

Spread a thin layer of jam over untoasted sides of 2 white-bread slices; divide half of lettuce, half of turkey, and all of cheese evenly on top. Spread a thin layer of jam over one side of each wheat-bread slice and place on top. Stack remaining turkey on wheat-bread slices.

Step 4

Top with tomato, season with salt and pepper, then top with bacon and remaining lettuce; sandwich with remaining 2 white-bread slices, toasted-sides up. Serve immediately.