Barley and Kale Salad with Golden Beets and Feta

Name: Barley and Kale Salad with Golden Beets and Feta
Ingredients: 1 /4 cup plus 2 Tbsp. extra-virgin olive oil; more for drizzling; 2 tablespoons white wine vinegar; 2 tablespoons (packed) light brown sugar; 1 /2 teaspoon finely grated orange zest; Kosher salt, freshly ground pepper; 1 bunch Tuscan kale, center ribs and stems removed, leaves cut into 1-inch squares; 1 /4 cup minced shallots; 3 medium golden beets (about 1 bunch), trimmed; 1 1/4 cups pearl barley; 4 ounces feta, crumbled; 2 teaspoons (or more) unseasoned rice vinegar