To make the dish, you simply slice up the beets as thinly as you can manage and combine the ingredients. The Kitchen has you toss the everything together prior to serving, but I go next level with laziness and simply squeeze the lemon juice over the beets, then sprinkle the chili powder on top.
Fuschia fingertips be darned this is worth a try if you like beets. You can even be fancy and call it carpaccio.
To make hearts just trim the beet's ends off and cut a v-shaped chunk out of the root end prior to slicing.