Crack the eggs into a large bowl and whisk thoroughly with a fork.
In a small bowl, combine the sugar and cinnamon. Place a slice of bread on a clean work surface and roll it out flat using a rolling pin. Repeat with all the slices. Remove the crust with a knife and reserve.
Take a slice of flattened bread and add a thin layer of chocolate spread (about 1 teaspoon) or your filling of choice. Roll up the bread. Repeat with the remaining slices.
Coat the bottom of a large nonstick pan with a thin layer of oil and warm over medium-high heat. Give the oil at least 1 minute to get hot. Once your oil is hot, dip each bread roll into the egg mixture, shake off any excess egg, then transfer to the hot pan.
Fry each roll-up for 1 to 3 minutes on each side or until golden brown.
If you like, you can dip the bread crusts into the egg and fry these up. Transfer the cooked roll-ups and crusts to a plate and dust in the cinnamon-sugar.
Notes
How to keep a tight roll: Make sure the roll-ups stay closed when frying by holding them down for a couple of seconds with your tongs when you place them seam side-down in the oil. You can also use a toothpick to hold them together while frying and remove it once cooked.
Fillings: You can use any sweet spread here: fruit jams, marmalades, nut butter, etc. Even a cream cheese/jam combo would be delicious!
Toppings and dips: Instead of cinnamon sugar, you can also serve these French Toast Rollups with small bowls of maple syrup for dipping.
Bread variations: Use any bread you love here: gluten-free, whole wheat, rye, etc. Just make sure it's soft enough to roll out.