Raw carrot blended with milk, sugar and vanilla, then strained. Made with milk rather than water, which is the Colombian way, and it takes five minutes.
In Colombia this is made with milk rather than water, which turns it from a juice into something closer to a milkshake and takes the edge off the raw carrot. Chop the carrot small before it goes in: raw carrot is dense, and a blender left to deal with large chunks gives a gritty result no matter how long it runs. Straining is what separates this from a smoothie, since carrot fibre does not break down smoothly. Taste before adding sugar, because carrots are sweet enough that many people add none.