Cut the trim off the bread with a bread knife. Roll each slice out with rolling pin until it is really flat.
Mix the cheese, sugar, and egg yolk well. Spread on each piece of bread and roll each one up. Don't roll it really tight. Lay aside. You have enough filling to do all the bread.
In bowl 1 melt 2 sticks of margarine. In bowl 2 mix together 2 cups white sugar and 3 tablespoons of cinnamon well.
Dip each one in butter and then roll in cinnamon sugar. Have someone to help you, one do the butter and one do the sugar. If you go from butter to sugar you have a mess. If there no one to help me I dip them all in the butter and lay on foil then dip them in the sugar.
Preheat the oven to 350ºF.
Bake on foil lined pan or parchment paper for 8 minutes. Remove as soon as they come from the oven.