Herby Chicken Grain Bowls with Feta Dressing

Name: Herby Chicken Grain Bowls with Feta Dressing
Ingredients: 1 pound carrots (3 large or 6 small); 1 pound thick asparagus; 8 ounces sugar snap peas; 3 tablespoons extra-virgin olive oil, divided; 1 large lemon; 1 large clove garlic; 4 sprigs fresh parsley; 3/4 cup quinoa; 3/4 cup long grain brown rice; 2 1/4 plus 1/3 cups water, divided; 2 teaspoons kosher salt, divided, plus more as needed; 1/2 plus 1/8 teaspoon freshly ground black pepper, divided, plus more as needed; 3 boneless, skinless chicken breasts (about 1 1/2 pounds total); 6 ounces feta cheese; 1/3 cup water; 3 medium scallions; 4 red radishes (about 8 ounces total)