1) In a bowl set over a pan of simmering water, or a double boiler, whisk together:
1/2 cup fresh lemon juice
1 stick of butter
1 cup of sugar
3 large eggs
pinch of salt
2) Keep whisking and heating (don't let mixture boil) until it thickens and coats the back of a spoon. (It took mine about 20 minutes to thicken up).
4) Stir in 3 teaspoons of lemon zest.
6) Cool to room temp and then put in refrigerator to chill.
There are many ways to serve this. You can make a tart or use it as a spread for biscuits or scones. I have enjoyed it swirled into some vanilla yogurt with a bit of granola.
I hope you try this. It really is delicious!