4 tablespoons hazelnuts, divided
1/4 cup fresh orange juice
1 tablespoon fresh lemon juice
2 tablespoons vegetable oil
2 teaspoons hazelnut oil
Kosher salt and freshly ground black pepper
1 medium red beet, peeled
1 medium golden beet, peeled
1 small turnip, peeled
1 carrot, peeled
2 radishes, trimmed
1/4 cup (loosely packed) flat-leaf parsley
Instructions
Crush 2 Tbsp. hazelnuts; place in a small bowl. Whisk in orange and lemon juice, vegetable oil, and hazelnut oil. Season vinaigrette to taste with salt and pepper.
Thinly slice beets, turnip, carrot, and radishes using a mandoline or V-slicer. Place red beet slices in another small bowl and remaining vegetables and parsley in a medium bowl. Spoon 3 Tbsp. vinaigrette over red beets; pour remaining vinaigrette over vegetables in medium bowl. Toss each to coat. Season with salt and pepper.
Arrange red beets on a platter; spoon over any vinaigrette from bowl. Top red beets with remaining vegetables. Drizzle salad with any remaining vinaigrette; garnish with remaining 2 Tbsp. hazelnuts.