Scrub potatoes, leave skins on
Cut larger potatoes into 1-inch chunks, keep small ones whole or halved
Place in large pot, cover with cold water by 1 inch, add 1 tbsp salt
Bring to boil, reduce to medium, simmer 12-15 minutes until fork-tender
Don't overcook—should hold shape
Drain in colander, let steam dry 2-3 minutes
Make dressing: whisk olive oil, lemon juice, Dijon, vinegar, garlic, honey, zest, oregano, salt, pepper, red pepper flakes
Or shake in jar
Transfer warm potatoes to large bowl
Pour ¾ of dressing over warm potatoes, toss gently
Let cool 10-15 minutes, stirring occasionally
Add onion, celery, capers, olives if using, toss gently
Fold in parsley, dill, chives, reserve some for garnish
Add remaining dressing, toss, taste and adjust seasoning
Cover, refrigerate at least 30 minutes up to 24 hours
Before serving, bring to room temp 15-20 minutes
Toss again, adjust seasoning
Garnish with reserved herbs
Serve at room temperature or chilled