Place the 3 eggs in a bowl and beat them. Then add the milk and mix very well.

Soak the slices of bread in the egg and milk mixture. It's best to do this one or two at a time, so they don't stick together. Do it quickly to prevent the bread from falling apart.

Heat the butter in a pan. Once it's completely melted and very hot, spread it around the pan and add the slice (or two slices). When the side being cooked is golden, flip the toast and cook the other side. Once both sides are done, remove the slices and place them on a plate kept in the oven at about 210°F (100°C) to keep them warm while you make the rest.

Once all are done, sprinkle with sugar and cinnamon. Serve hot.