Beat egg yolk in a bowl until they get thick. In large saucepan, beat together eggs and evaporated milk. Cook over low heat, stirring constantly, until mixture is thick enough to coat a metal spoon. Remove from heat. Stir in remaining ingredients. Cover and refrigerate. Serve garnished with an extra sprinkle of cinnamon!
Give the mixture a day or two to chill in the refrigerator to combine flavors. Best served cold.