In a food processor, coarsely grate beets, carrots, and onion. Transfer to medium bowl. 

Add eggs, flour, salt, and pepper; stir to combine. 

Fried method:

In a large skillet, add evoo until depth reaches ½ inch, and heat over medium-high heat. Spoon ¼-cup sized scoops of latke mixture into the pan, and flatten with the back of a spoon or spatula. Fry until golden, 4-6 minutes per side. Remove to a paper towel-lined plate to drain.

Baked method:

Preheat oven to 450°F. Place ¼-cup sized spoonfuls of the prepared latke mixture on a cookie sheet lined with parchment and coated with evoo. Flatten each latke with the back of a spatula.

 Bake for 10 minutes. Flip the latkes and bake for another 10 minutes, until crisp and golden. 

Source: Savvima.com