In a medium bowl, combine the fresh lemon juice, lemon zest, and minced garlic. If using Dijon mustard, add it now. Let sit for 1-2 minutes.
Slowly drizzle the extra-virgin olive oil into the lemon mixture while whisking continuously until emulsified.
Season with salt and freshly ground black pepper to taste.
If using, add optional ingredients like honey or maple syrup, herbs, or red pepper flakes.
Taste and adjust seasoning if needed. Add more lemon juice for acidity or olive oil for richness.
Transfer to a sealed glass jar for storage or use immediately.