Gather all your ingredients and measure them. This step makes the blending process smoother. Remove the stems from your basil and roughly chop the shallot and garlic.

In a blender or food processor, add the fresh basil leaves, olive oil, shallot, garlic, red wine vinegar, and kosher salt. If you're using crushed red pepper flakes, Parmesan cheese, or lemon zest, add those in as well.

Secure the lid on the blender and pulse the mixture until it’s well-blended. You want a smooth, vibrant green dressing. If it seems too thick, add a bit more olive oil or a splash of water to thin it out.

Once blended, taste your vinaigrette. Adjust the flavor by adding more salt, vinegar, or lemon zest if desired. This is your creation, so make it perfect for your palate!

Once satisfied with the flavor, transfer your basil vinaigrette to a jar or airtight container. You can serve it immediately or refrigerate it until you’re ready to use it. Just give it a quick shake before serving if it settles a bit.