[header] How to preserve ginger paste [title] Add 2 tablespoons (30 ml) of vegetable oil. [step] The addition of oil helps preserve the paste when it's put in the fridge or freezer. The actual amount you add can be adjusted to your flavor preference. 
[substeps] Any neutral-flavored oil, like canola or avocado oil, will work in place of vegetable oil. Using a small amount of vinegar will have a similar effect, but may affect the flavor.