Roll one slice out to about 1/8-inch thickness with a rolling pin.
Spread each slice of bread with a thin layer of the melted butter mixture and roll up tightly.
Repeat with remaining bread slices and butter mixture.
Place 3 tablespoons butter in a large non-stick saute pan and let melt over medium heat. (If using a small saute pan, use just 2 tablespoons butter and saute the roll-ups in two batches)
Dip each roll one at a time in the egg mixture. Then place in the sauté pan, seam side down.
Allow roll ups to saute for 1-2 minutes per side until golden brown and slightly crisp on the outside.
Remove to a work surface and sprinkle each roll up generously with the cinnamon sugar mixture
Serve immediately with maple syrup.
How to Store and Reheat French Toast Roll Ups