Black Sesame Paste (not too sweet)

RECIPE: healthynibblesandbits.com/black-sesame-paste/

A few questions people have asked: can you use sesame oil? If you can find untoasted sesame oil, that's probably fine. But a lot of sesame oils you'd find in grocery stores are toasted, and the flavor will be way too overpowering for this paste.

Trying other sweeteners: I tried this with honey and the paste was too stiff