In a medium bowl, toss the potatoes in the oil, salt, and pepper (or Cajun seasoning). Arrange in a single layer on a baking sheet and roast in the oven for 30 to 40 minutes, until crispy.
In a separate medium bowl, mix together the sour cream, mustard, garlic, and chives.
Toss the roasted potatoes in the dressing while warm. Serve warm or room temperature.
If using the carrots, toss the shreds in the olive oil and season to taste with lime juice, salt, and pepper. Lay the carrots on the plate and add the potatoes on top! Thank me later.