Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to freeze pesto [title] Scoop your pesto into an ice cube tray using a spoon. [step] Fill each cell in the ice cube tray evenly. Don't put so much pesto in that the cells overflow into each other.

Ending1: If you fill the whole ice cube tray and you still have more pesto, grab a second tray to use. [substeps] The pesto may stain light-colored ice cube trays, so use trays you don't mind getting discolored. Ending2: If the cells fill up and the pesto appears lumpy, re-spoon it into the freezer. [substeps] Keep an eye on pesto grinding. Ending3: Leave enough space in each cell so that your pesto can stick to the sides instead of going in. [substeps] Give your pesto just a few minutes to warm up before freezing it again. Ending4: If one cell overfills, the pesto will be completely frozen. [substeps] If you prefer to roll pesto into batches, place a rolling pin in between each cell.

Answer format: ending1/ending2/ending3/ending4