Creating Strawberry and Cinnamon French Toast Roll-Ups is a straightforward process if you follow these steps:

1. Prepare the Bread: Begin by removing the crusts from the slices of bread. Use a rolling pin to flatten each slice gently.
2. Mix the Filling: In a bowl, combine the sliced strawberries and a tablespoon of sugar (if using). Set aside to allow the strawberries to release some juices.
3. Make the Egg Mixture: In a separate bowl, whisk together the eggs, milk, and vanilla extract until well combined.
4. Assemble the Roll-Ups: Place a few sliced strawberries at one end of the flattened bread slice. Roll it up tightly and secure it with a toothpick if needed.
5. Heat the Pan: In a skillet, melt the butter over medium heat. Ensure it coats the bottom of the pan well.
6. Dip the Roll-Ups: Dip each roll-up into the egg mixture, allowing it to soak slightly on all sides.
7. Cook the Roll-Ups: Place the roll-ups seam-side down in the skillet. Cook for about 3-4 minutes on each side, until golden brown and cooked through.
8. Prepare the Cinnamon Sugar: In a small bowl, mix the ground cinnamon and remaining sugar (if using).
9. Coat the Roll-Ups: Once cooked, remove the roll-ups from the skillet and coat them in the cinnamon sugar mixture while they’re still warm.
10. Remove Toothpicks: If you used toothpicks, remove them carefully before serving.

By following these steps, you will achieve perfectly crispy, golden roll-ups filled with fruity deliciousness.