Add the frozen fries & dry seasonings to a baking sheet and toss to combine. Cook according to the package instructions.
Meanwhile, add the feta, oil, yogurt, lemon juice, chives & garlic to a food processor. Blend until smooth. Taste and adjust seasonings - you can add salt & pepper if needed.
When the fries are done, top them with parsley and serve with the dip on the side.
Notes
If you buy frozen french fries that are already seasoned, you can skip the dry seasonings.
If the chive dip is too thick, you can add more oil as it is blending.