Cut off the crusts from the bread.

Flatten the bread slices with a rolling pin.

In a bowl, mix the cream cheese, sugar, and egg yolks using an electric mixer until well combined.

Spread the cream cheese mixture evenly onto each flattened bread slice.

Roll each bread slice into a jelly roll shape.

Cut each roll into thirds.

Melt the margarine.

Roll each piece in the melted margarine.

Then roll in a mixture of cinnamon and sugar.

Place the blintzes on a cookie sheet and freeze.

Preheat the oven to 350°F (175°C).

Bake for 15 to 20 minutes, or until lightly browned.

Serve warm with sour cream or applesauce.