01 - In a small bowl, combine the Dijon mustard, vinegar, honey (if using), garlic, salt, and pepper.
02 - Whisk vigorously until the mixture is completely smooth and well blended.
03 - Slowly drizzle in the olive oil in a thin, steady stream while whisking continuously to create a slightly thick, emulsified dressing.
04 - Taste the vinaigrette and adjust salt, pepper, or vinegar as desired to suit your preference.
05 - Serve immediately over salad or grilled vegetables, or transfer to a sealed jar and refrigerate for up to 1 week.