Preheat the oven to 425F convection or 450F. Line a baking sheet with parchment paper. Drizzle the oil onto the parchment and use a brush or your hands to spread it around to coat.
Add farro to a medium pot and add enough water to cover by at least 2 inches. Bring to a boil, then reduce the heat to a rapid simmer and cook for 15-20 minutes, or until cooked through. Drain and set aside to cool.
In a high-speed blender or food processor, add the onion and garlic and blend until chopped up. Add in the herbs, beet, oats, chickpeas, egg, spices, and salt. Pulse/blend until evenly combined, using a damper tool encourage blending. Scrape under the blade and blend again if it’s not coming together easily.
Use a cookie scoop to scoop the beetballs onto the baking sheet. Roll them around in the oil on the parchment to coat.
Bake for 15-20 minutes, or until crispy and browned on the bottom.
Add all of the dressing ingredients to a jar with a tight fitting lid. Shake vigorously to combine.
In a large bowl, add farro, arugula, and olives. Add about ¼ cup of dressing and toss to coat. Top with beetballs, drizzle everything with more dressing, and sprinkle with parmesan and nuts.