Drop the garlic and onion into the blender with just enough liquid to get it moving. Pulse with just enough of the liquid ingredients to (probably the rice vinegar, maybe the soy, depending on your blender) to puree the garlic and onion.

Stop and add the honey, lime juice, fish sauce sesame oil, mustard powder and ground black pepper. The black pepper is somewhat subjective; feel free to try the smaller amount, taste when finished, and add more if desired.) Blend together, then slowly drizzle the oil in through the top of the blender.

Stir in the cracked black pepper.

Taste, and if desired add more of the ground black pepper, or if the vinaigrette seems too thick or intense, add water by the tablespoon, tasting until desired heat level and or consistency is reached.