Preheat the oven to 450F or 425F convection. Line a baking sheet with parchment paper.
To the baking sheet, add the beets, oil, and salt. Use your hands to toss until well coated. Spread into an evenly distributed layer. Bake for 25-30 minutes or until the beets are cooked and crisped on the edges
(See “optional” note below). In a high-speed blender, add all of the dressing ingredients and blend on high until smooth.
In a large bowl, add the kale, fennel, beets, and ⅔ of the dressing. Toss to coat. Serve drizzled with remaining dressing and top with cheese, avocado, and nuts.
Optional: to infuse more rosemary flavor into the dressing, add the olive oil and rosemary to a small pot or skillet over low heat and let it cook for 5 minutes (turn off the heat once the rosemary starts sizzling). Make sure it does not get too hot and start to smoke. Let cool for a bit, then add to the blender.