16longtoothpicks (to secure the sandwich together)
In a small bowl combine the mayo with mustard until blended.
Spread about 1-2 teaspoons on one side of each slice of the 12 toasted bread slices.
To assemble ONE sandwich; layer 1 slice of toast mayo-side up on a cutting board, then place a lettuce leaf on top of the bread, then one slice of cheese, then ham, then 2 slices tomatoes, sprinkle salt and lots black pepper over the tomatoes, then 1 slice toast (mayo-side down).
Spread mayo mixture onto the top of the bread.
For the top portion of the sandwich; continue to assemble the sandwich with a cheese slice on top of the bread, then turkey slices, then 2 slices bacon, then 1 lettuce leaf and then 1 slice of toast (mayo-side down) you should have 3 slices of bread for each sandwich (this is for 1 sandwich, continue making the remaining three sandwiches in the same manner).
Cut EACH sandwich into 4 triangles, then secure with long toothpicks.