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After you blend up the ingredients, let it sit in the blender for a while. The sesame oil rises to the top, and you can easily separate it after the other oil sinks to the bottom. Depending on what oil you used, the sesame oil may separate at different rates. For instance, when using peanut oil, it may only take 45 minutes for your oil to separate. If using sunflower seed oil, it may take up to 2 hours.
Let your ingredients sit for 45 minutes to 2 hours.