In a saucepan, bring the milk with the sugar and the cinnamon to a simmer. Once simmering, turn off the heat, remove the cinnamon stick if you used one, and pour the milk in a large deep dish or plate.
Beat the eggs in a large deep plate.
Cut the bread loaf in slices, 2 to 3 cm thick.
Dip the bread in the milk, on both sides. Make sure to leave it long enough for the bread to be fully soaked, but not too long or the slices will loose their shape and break apart.
Once fully soaked, dip the slices in the beaten eggs, coating every side.
Heat up a large frying pan with the oil. Fry each slice on medium high heat, until crisp and golden brown on each side. If you do it in batches, make sure not to leave the bread with the milk for too long while you do other things (yes, that's experience talking!)
Once golden brown on all sides, place them on a paper towel to absorb the excess oil (I also dab at them with another paper towel to remove even more excess oil)
In a plate, mix some sugar and cinnamon, and cover each slice with the mixture on each side.
Enjoy within one day or two (who are we kidding, they'll never last that long) :)