Make the green goddess dressing: In a small bowl or mini blender combine: Greek yogurt, mayo, lemon juice, Dijon, garlic, basil, tarragon, olive oil, salt
Whisk until smooth or blend together (for a bright green color)
Prepare the mackerel: Add drained Atlantic mackerel to a bowl and gently break it apart with a fork.
Then Add: celery, red onion, chives, parsley, dill, lemon zest, black pepper
Add 3–4 tablespoons of the green goddess dressing and gently fold together.
Taste and adjust with more lemon juice or salt if needed.