Carrots become a vibrant ingredient when paired with citrus. If you do not have Cara Cara at your grocery store, you can replace them with any orange or tangerine. You can make the pesto and blanch the carrots ahead of time and keep them refrigerated for up to a week. Just pull them out of the fridge about half an hour before you start to boil the water to temper and warm a little bit. In this recipe I call for the use of a food processor, if you do not have on you can use a knife and then hand mix all ingredients together. The final product will be more rustic but have the same flavor.