Classic Lemon Curd

"Lemon curd is very popular in California where it is usually made with Meyer lemons. A Meyer lemon is a cross between a lemon and a mandarin orange, and came from China in 1908. It was planted all across California, and chefs quickly fell in love with its sweet, complex flavors. Once a darling of the "California Cuisine" movement, it's now common on many dessert menus. If you can get Meyer lemons, give them a try. If not, don’t worry; it is still very delicious with regular lemons. While it's traditionally served as a topping for cakes, it's also wonderful spooned over a bowl of fresh berries. Makes about 2 cups..."