In a medium bowl, whisk together the lemon juice, Dijon mustard, honey (or maple syrup), minced garlic, salt, and black pepper until well combined.
Slowly drizzle in the olive oil while continuing to whisk until the dressing is emulsified and smooth.
If using, stir in the chopped parsley for added flavor and freshness.
Taste and adjust seasoning if necessary, adding more salt, pepper, or lemon juice to suit your preference.
Transfer the vinaigrette to a jar or airtight container and refrigerate for at least 30 minutes to allow the flavors to meld. Shake well before serving.