It is very important to use a thermometer to monitor the temperature of the ice cream base after you have created the liaison and have it over medium heat to thicken it. If it gets away from you, IMMEDIATELY pour off the ice cream into a bowl set over ice. DO NOT scrape the bottom of the pan. Hopefully, you can strain out the cooked eggs but often there is no saving the ice cream base and you have to start over. Be sure to strain the base before proceeding with the rest of the instructions.