Heat a griddle pan or large skillet over medium-high heat; cook bacon until done (about 5 minutes); remove to paper towels to drain.
Drain off fat from skillet; reheat griddle over medium heat.
In a bowl, beat eggs with half-and-half, nutmeg, and pepper.
Add in 1 tablespoon butter to the griddle and let it melt.
Turn 4 slices bread in the egg batter then place on griddle; turn bread after it browns (2-3 minutes); spread mustard on 2 slices bread and top the other 2 slices with cranberry sauce.
Place a slice of cheese on each slice; add 2 slices bacon, ham, and turkey to bottoms then set tops in place and press sandwiches together.
Turn the sandwiches a couple of times and let set a minute or 2 to melt cheese and warm meats.
Repeat to make 2 more sandwiches; cut sandwiches from corner to corner to serve.
Heat syrup in microwave for 30 seconds; drizzle syrup over sandwiches at table or serve syrup in small ramekins for dipping.