Preheat oven to 400°F (200°C). Toss beet wedges with 1 tbsp olive oil, salt, and pepper; roast for 35–45 minutes until tender and caramelized.
Cook farro in salted water for 25–30 minutes until tender; drain and toss with remaining olive oil and a pinch of salt.
Mix yogurt with grated garlic, half the herbs, salt, and water to loosen; taste and adjust seasoning.
Whisk lemon juice and honey with olive oil to make a dressing. Toss warm farro with greens, then drizzle with dressing.
Assemble bowls with grains, roasted beets, radishes, walnuts, and a spoonful of herbed yogurt; top with remaining herbs and pepper. Serve warm or at room temperature.
Notes
For a dairy-free version, substitute coconut yogurt.