Some people think the best way to control this heat is by using a double boiler with the sauce in the top and simmering water in the bottom. A more expeditious way to control the heat, however, is to place an asbestos pad or metal disk known as a Flame Tamer over the heat. Then place the saucepan on the pad or disk and continue making the sauce over low heat. The pad or disk distributes the heat more evenly over the bottom of the pan and decreases the danger of curdling. Take care, however, to stir the sauce constantly, using a wooden spoon and moving it this way and that way all over the bottom of the saucepan. All areas of the bottom should be covered to prevent the sauce from sticking.
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