Slow Cooker Chicken Cacciatore

Bahan-bahan (4 porsi)

• 1 tablespoon extra-virgin olive oil (plus 2 teaspoons, divided)
• 2 pounds boneless skinless chicken breasts (or thighs)
• 1 teaspoon kosher salt
• 1/2 teaspoon ground black pepper
• 1 medium yellow onion (chopped)
• 3 cloves garlic (minced)
• 1 tablespoon balsamic vinegar (plus 1/2 teaspoon, divided)
• 1 can crushed tomatoes (28 ounces)
• 1 medium green bell pepper (chopped)
• 8 ounces sliced baby bella cremini mushrooms
• 2 teaspoons Italian seasoning
• Whole wheat pasta (brown rice, polenta, rice, zucchini noodles, or baked and shredded spaghetti squash)
• Chopped fresh parsley (freshly grated Parmesan cheese)