In 3-quart saucepan, heat milk over medium-high heat until bubbles begin to form around edge of pan (do not boil). Add crushed cereal; stir with whisk until combined. Remove from heat. Add 1/4 cup of the warm milk mixture to egg mixture; stir with whisk until combined. Repeat twice. Transfer egg mixture to saucepan. Cook over medium-low heat until mixture thickens and coats back of spoon. Remove from heat; cool completely.