In a small bowl, combine cream cheese, jelly, and cinnamon. Spread 1 side of each bread slice evenly with cream-cheese mixture. Top 6 bread slices with a single layer of apple slices. Top with remaining bread slices, cream-cheese sides together, to create 6 apple "sandwiches."

Lightly grease a 13-x-9-x-2-inch baking dish. Fit sandwiches into dish in a single layer; set aside.

In a small bowl, whisk together eggs and milk. Pour over sandwiches. Cover and chill for at least 30 minutes, turning sandwiches once.

Preheat oven to 400 degrees. Lightly grease a baking sheet; place sandwiches in a single layer on pan, discarding any excess egg mixture.

Bake for 20 to 25 minutes, or until lightly browned. Serve with Cinnamon Syrup.