Rinse black-eyed peas under a gentle stream until canning liquid is gone.
Drain 2 minutes, spread over a clean towel, blot lightly and stand 5 minutes.
Dice bell pepper, cucumber and celery; quarter tomatoes, slice scallions and chop herbs. Blot watery pieces.
Whisk vinegar, lemon, Dijon, honey, garlic, salt and pepper, then stream in olive oil.
Toss bell pepper, cucumber, celery, tomatoes and scallions in the vinaigrette.
Add dry black-eyed peas and fold six to eight times with a broad spatula.
Sprinkle parsley and dill over the bowl and fold two or three more times.
Refrigerate 30 minutes, then adjust acid by the teaspoon or salt by a small pinch.