I used my little hand held Donvier ice cream maker. You freeze the inner cyclinder then hand churn every three minutes. It took about 30 minutes to firm up. The flavor turned out pretty good. I did have to add additional 1/2 cup of sugar, because it was too tangy and still a little too plain yogurt tasting. I wasn't sure 2/3 of a cup of lemon curd would be enough, but after it was frozen the flavor came through much better.