In a saucepan over medium-high heat, combine the sugar and cornstarch. Slowly add the milk, whisking until combined. Cook until the mixture boils and begins to thicken. Add the chocolate. Temper the egg yolk with some of the chocolate mixture and pour the yolk into the saucepan. Cook, stirring constantly, over low heat until smooth and thick. Remove from heat and stir in the almond extract. Transfer to a serving bowl and serve with fresh strawberries, pound cake chunks, cheesecake chunks, and cookies.