Using a box grater or food processor, coarsely grate the carrots and beets. Toss together with the red onions and pepitas in a large bowl.
In a smaller bowl or measuring cup, whisk together the dressing ingredients. Pour over salad, and toss.
This salad can be enjoyed right away, but is delightful chilled.
Notes
Because there are no tender leafy greens, this is one of those handy kinds of salads that can easily be made ahead without the worry of anything wilting.