The first time I made curd was on New Year's Eve a few years ago when I had decided to host a festive dinner for friends. That month's Martha Stewart Living had featured a gorgeous recipe for a holiday showstopper called "Lemon-Mascarpone Crepe Cake," and if Dec. 31 isn't an evening fit for showstoppers, I don't know what is.
So early in the day, I made the curd -- a standard lemon affair, piquant and pure with nothing more than egg, sugar, butter and fresh lemon juice melded into a loose custard, its luxurious, almost velvety texture disguising the simplicity of its construction. Then I moved on to the crepes, which would be layered with the curd to build the cake, and as one hour of crepe cooking passed into two and then three, the elegance of the intended result paled in comparison to the effort. As I swirled the final bit of crepe batter around the pan, I resolved that the cake would remain in the realm of special occasions -- but the curd was another matter entirely. I wanted to encounter its creamy goodness throughout the year.
So let's arrange a rendezvous now. Curd is one of those dishes that should take on the flavors of the season, so we'll leave the classic lemon aside (except for two brightening and custard-stabilizing tablespoons) and instead take advantage of the last of the rhubarb crop, which is just finishing its run in the farmers markets of many parts of the country. An ideal rhubarb curd possesses both the floral, somehow dewy flavor of the rhubarb and a charming pink hue that lives up to summer's bright palette.
Unburdening the rhubarb stalks of their juice is a bit more involved than squeezing a lemon, but the extraction process offers us the opportunity to heighten the vegetable's floral qualities by simmering it with orange peel and vanilla bean. An optional splash of elderflower liqueur at the end of the cooking process takes the whole thing right into grandma's flower garden, which should be in full bloom about now.
But before we are carried away in this idyll, I must note that my tests revealed that if it is a rosy pale pink we are after in this curd, the red pigments in the rhubarb -- you should choose the reddest ones you can find -- are not alone enough to overcome the yellow of the eggs. One could add food coloring, I suppose, but why toy with synthetic compounds when half a beet simmered with the stalks will do an even better job?
Once you've produced this blushing, vanilla-speckled dream, you can use it everywhere a sweet note is welcome. Desserts, ranging from layer cakes and mousse to cookies or ice cream, are a natural home. But my favorite meeting time is over breakfast or tea, where curd makes the most endearing conversation with toast, oatmeal, scones, muffins or with orange popovers. Keep a jar of this stuff on hand, and you'll never be caught by a guest (or by your own sweet tooth) unprepared, no matter the day or time.