Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make rhubarb butter [title] Wash the rhubarb thoroughly. [step] Slice off the broad green leaves and the ends of the stalks. Place the rhubarb stalks in a colander or grip a bunch loosely in one hand and run them under a stream of cool water.

Ending1: After rinsing and drying them, cut off the leaves and half of the stalk with a sharp knife. For a rustic sweet rhubarb butter, you can skip the cutting and chopping for a mature recipe. Ending2: Scrub off any visible dirt and remove damaged or discolored spots with a paring knife. [substeps] Fresh rhubarb can be found seasonally (late spring to early summer) at most supermarkets and specialty food stores. Ending3: Sprinkle in some seeds and store them away from direct sunlight. [title] Combine the butter and sugar in a small bowl. Ending4: You must also wash each stalk individually to remove all traces of rhubarb. [title] Wash the rhubarb stalks.

Answer format: ending1/ending2/ending3/ending4