Spoon off only an unusual clear pool of surface whey from the cottage cheese; do not press or fully drain the curds.
Blend cottage cheese and Greek yogurt for 60 seconds, scrape safely, then continue until glossy with no visible curds.
Add lemon juice, Dijon, dried dill, dried chives, garlic powder, onion powder, salt and pepper. Blend 20 to 30 seconds until evenly flecked.
Drag a spoon through the dip; the groove should remain briefly. If extremely stiff, add cold water 1 teaspoon at a time and pulse.
Transfer to a bowl and fold in optional parsley by hand. Taste, remembering the dried herbs strengthen as they hydrate.
Cover and refrigerate at least 30 minutes. Stir once and adjust with only 1 teaspoon water or lemon juice if needed.
Wash, thoroughly dry and cut sturdy vegetables. Keep juicy vegetables separate until serving and serve the dip cold.