slow cooker chicken cacciatore

Ingredients

• 2 1/2 pounds boneless, skinless chicken thighs
• 1 teaspoon ground himalayan sea salt, or to taste
• 1 teaspoon freshly ground black pepper, or to taste (i always use mixed peppercorns)
• 2 tablespoons olive oil
• 2 cups white onions, chopped
• 1 cup red peppers, chopped
• 1 cup poblano peppers, chopped (substitute green peppers)
• 6 large cloves garlic, pressed
• 12 ounces button mushrooms, washed and sliced
• 1 1/2 cups roma tomatoes, seeded and cubed
• 1 tablespoon italian seasoning
• 1 teaspoon dried rosemary
• 1 teaspoon dried thyme leaves
• 1 teaspoon red pepper flakes
• 1 large bay leaf
• 2 cups (16 oz.) tomato purée
• 1 1/2 cups (12 oz.) marinara sauce
• 1/2 cup low-sodium chicken broth
• 1/2 cup dry red wine
• 1 tablespoon balsamic vinegar
• 1/2 cup black olives, pitted
• 1 tablespoon cornstarch (mixed with 1/2 cup cold water)