Put the egg mixture into the top of a double boiler. I use a stainless steel bowl on top of a sauce pot. Don’t let the water in the bottom pot boil, just lightly simmer. If it boils, you may cook the egg in spots. I keep the bowl covered until the temperature approaches 140. Keep scraping the sides and bottom of the bowl with a spatula so you don’t cook the eggs. Heat until the temperature reaches 140 and then stays at or above 140 for 3 minutes, or until the temperature reaches 160, whichever comes first.