Wash the chadon beni (culantro) leaves. Place the leaves on a cutting board and use a kitchen knife to roughly chop them.
Peel and wash the garlic and ginger.
Set the chadon beni, garlic, and ginger aside on a plate.
Wearing food safe nitrile gloves, wash the scotch bonnet peppers under running water. Place the peppers on a cutting board and use the kitchen knife to cut off the ends of the peppers.
Pour the scotch bonnet peppers, chadon beni, garlic, ginger, vinegar, and lime juice into a blender and blend until smooth or a little bit coarse, if you prefer.
Add the mustard and salt to the mixture and blend to mix everything together.
Pour the pepper sauce into a clean, sterile glass container (see the notes above for how to sterilize jars for canning).
Store the pepper sauce and use as needed (see the notes above for how to store pepper sauce).