Slow-Cooker Garlic Chicken with Couscous

INGREDIENTS

• 1 whole chicken (3 1/2 to 4 pounds), cut into 6 to 8 pieces and patted dry
• Coarse salt and ground pepper
• 1 tablespoon extra-virgin olive oil
• 1 medium yellow onion, halved and thinly sliced
• 6 garlic cloves, halved
• 2 teaspoons dried thyme
• 1 cup dry white wine, such as Sauvignon Blanc
• 1/3 cup all-purpose flour
• 1 cup couscous
• Chopped fresh parsley, for serving