In a saucepan, combine the milk, sugar, and cinnamon stick. Place over medium heat and heat until the mixture starts to simmer. Stir occasionally to dissolve the sugar. Once simmering, remove from heat and let the mixture cool for about 10 minutes. Remove the cinnamon stick.
Pour the milk mixture into a shallow dish or baking pan.
Dip each slice of bread into the milk mixture, making sure it is thoroughly soaked on both sides. Allow the bread to absorb the liquid for a few seconds.
In a separate bowl, beat the eggs until well combined.
Heat vegetable oil in a large frying pan over medium-high heat.
Dip each soaked slice of bread into the beaten eggs, coating it evenly on both sides.
Carefully place the coated bread slices in the hot oil and fry until golden brown on each side. This should take about 2-3 minutes per side.
Once fried, transfer the torrijas to a plate lined with paper towels to drain excess oil.
In a shallow dish, combine sugar and ground cinnamon to create a coating mixture.
While the torrijas are still warm, coat them in the sugar-cinnamon mixture, ensuring they are evenly coated on all sides.
Serve the torrijas warm or at room temperature. They can be enjoyed on their own or served with a drizzle of honey, syrup, or a sprinkle of powdered sugar.