Rhubarb's bracing acidity and generous fragrance make it a perfect medium for drinks. You cook down a little rhubarb with sugar and a dash of water, season it however you like -- ginger, lemongrass, or why not cardamom? -- strain the mixture, and blend the syrup with sparkling water or, better yet, prosecco. <br /> <br />Here I added vanilla to the rhubarb and then squeezed a lime into the drink. And as I sit here sipping it on a late April evening when it's still 80 degrees out, I'm pretty happy with my little midnight elixir.

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