The red batches of this frozen rhubarb sauce (16 fl. oz.; $3) were made from plants that got more sun, the green, less sun, but since they taste the same, I'm told, my choice was purely decorative. (Red.) Plop two tablespoons on your hot oatmeal, and you'll probably want a teaspoon of sugar, too; dress up your vanilla ice cream, and you should be good to go (even with the green).
341 Pancake Hollow Rd., Highland, New York
(at the Grand Army Plaza Greenmarket)