Chicken Lentil Salad (Make-Ahead)

Ingredients

• 1 small sweet potato, peeled and cut into ¼-inch cubes
• 1 small red onion, cut into thick wedges
• 2 teaspoons olive oil
• ¾ teaspoon kosher salt, divided
• ¼ teaspoon freshly ground black pepper
• 2 cups cooked green, brown, or French lentils
• 2 cups rotisserie chicken, shredded
• ⅓ cup crumbled feta cheese
• ¼ cup fresh parsley, chopped
• 2 tablespoons apple cider vinegar
• 1 tablespoon Dijon mustard
• 1 tablespoon honey
• ½ teaspoon kosher salt
• 3 tablespoons extra virgin olive oil