In a small bowl, combine granulated sugar with ground cinnamon and mix thoroughly.

In a shallow dish, whisk together eggs, milk, and vanilla extract until smooth.

Flatten each slice of bread and spread with melted butter, then sprinkle with cinnamon-sugar mixture before rolling tightly.

Preheat skillet, dip each roll-up in the egg mixture, and cook seam-side down until golden brown.

Remove rolled toast from skillet, let cool slightly, and serve warm with toppings.