Peel & chop kiwis. In a saucepan, combine kiwis, sugar & lemon juice. Bring mixture to a boil, stirring occasionally. Beat the egg yolks in a separate bowl. When kiwi mixture reaches a boil, very slowly add it to the egg yolks, whisking vigorously. Pour it back into the saucepan & allow to gently simmer about 8 minutes. The mixture should be thick enough to cover the spoon (it will thicken a little as it cools also). Remove mixture from heat & allow to cool until needed. If you wish, pulse curd in food processor for a couple of seconds.