Pork Bowls with Apple and Grapes

Name: Pork Bowls with Apple and Grapes
Ingredients: ½ cup red quinoa, rinsed and drained; ½ teaspoon salt, divided; 1 cup arugula; 2 tablespoons olive oil; 2 tablespoons balsamic vinegar; 1 tablespoon snipped fresh basil; 2 teaspoons lemon juice; 1 teaspoon honey; 1 teaspoon Dijon-style mustard; 1 clove garlic, minced; ¼ teaspoon black pepper; 1 pound natural pork tenderloin, trimmed; 1 large apple, cut into 12 to 16 slices; 1 medium onion, sliced and separated into rings; 1 cup seedless red grapes, halved; ¼ cup crumbled goat cheese (chèvre) (1 ounce)