Rhubarb stalks
Picked a big bunch of Rhubarb, cleaned it, cooked it up with sugar and put it in jars. Will make nice crumble, rhubarb fool and spread.
Here is what wikipedia has to say about it:
Rhubarb belongs to genus Rheum, a genus of perennial plants that grows from thick short rhizomes. The genus is in the family Polygonaceae, and includes the vegetable[1] rhubarb (Rheum rhabarbarum or Rheum x hybridum.) The plants have large leaves that are somewhat triangular shaped with long fleshy petioles. The flowers are small, greenish-white to rose-red, and grouped in large compound leafy inflorescences. A number of varieties of rhubarb have been domesticated both as medicinal plants and for human consumption. While the leaves are toxic, the stalks are used in pies and other foods for their tart flavour.