Fresh Basil Balsamic Vinaigrette

Place the vinegars, shallot, garlic, basil, salt, and pepper in a blender or a large container suitable for an immersion blender. Blend for 30 seconds or until smooth.
While blending, add the oil in a steady stream. Blend until smooth and emulsified. Taste and adjust for seasoning and consistency. If too thick, add water, 1 tablespoon at a time, and blend until the dressing is smooth and how you like it. Serve!