In a small bowl, combine the miso paste, rice vinegar, soy sauce or tamari, honey or maple syrup, sesame oil, grated ginger, and minced garlic (if using). Mix well until the ingredients are thoroughly combined.
Gradually add water, 1 tablespoon at a time, stirring continuously until you reach your desired consistency. Some prefer a thicker dressing, while others prefer it thinner. Adjust the amount of water accordingly.
Taste the dressing and adjust the seasoning if necessary. Depending on your preference, you can add more vinegar for acidity, more honey for sweetness, or more soy sauce for saltiness.
Once you're satisfied with the flavor and consistency, transfer the miso dressing to a jar or airtight container for storage.
Store the miso dressing in the refrigerator for up to one week. Before using, please stir or shake it well, as the ingredients may separate over time.