1. My first shot. I set up next to a northwest-facing sliding glass door in late afternoon so I had moderate, diffused light for this shot. I shoot in manual mode (always with a tripod!) and measured the exposure with my light meter at 1/30 sec at f4. The X-Rite Color Checker you see in the shot, in combination with its Lightroom-compatible software, ensures proper white balance.
2. With the beetroots facing the window in the first shot, I got exactly the opposite look I was going for, so I turned the board holding the beets 180 degrees to have the greens facing the window. In Lightroom, I increased highlights and darkened shadows just a tiny bit.
3. The green stems were a little too shaded, so I used a piece of white foam core board to reflect a little light back onto them. I held it up and to the left of the shot, about two feet away.
4. Added a little more fill light by moving the foam core board closer, plus I wanted more of the shot in focus, so I changed my settings to 1/4 sec at f8.
5. The beet in the upper-left of the previous shot looked dry and was reflecting too much light, which draws the eye, so I turned it over to make sure it looked more like the rest of the beets in the shot.
6. Another styling change. I felt the golden beets were spaced too evenly to be visually pleasing, so I grouped them together at the bottom of the shot and about 2/3 of the way up. This is a pretty good example of the Rule of Thirds, as the top golden beet sits at the upper-left intersection of the imaginary rule of thirds grid. At this point, I was pleased with everything and took one final shot: