Preparation
Use a rolling pin to roll out each slice of bread on a cutting board until flattened.
In a small bowl, mix the tofu with the ricotta cheese.
Spread about 2 tablespoons of the tofu-ricotta mixture on each flattened slice of bread, keeping about 1/4 inch away from the edges.
Roll up each slice of bread, pressing to seal the edges, and cut each roll into 3 horizontal pieces.
In a large shallow baking dish, whisk together the egg whites, cinnamon, salt, and vanilla.
Dip each piece in the egg mixture until saturated on all sides, then cook in a well-greased skillet over moderate heat, turning to brown each side.
Remove from heat and lightly dust each piece with cinnamon sugar before serving.