For salad: In a large bowl toss all salad ingredients together.
For vinaigrette: Add the lemon juice to a glass measuring cup. Add enough vinegar to the lemon juice to equal 1/4 cup liquid. Add remaining ingredients and whisk until dressing is emulsified.
Drizzle dressing over the chicken salad and toss to combine. Serve immediately.
Notes
If you're not serving the salad immediately, wait to add the herbs just before serving for brighter, and fresher flavors.