Crockpot Stuffed Turkey Breast

• 2 1/2 bacon croutons
• 1 onion
• 1 turkey breast
• 1 cheesecloth
• 1 wine (white)
• 1/2 poultry seasoning
• 240 ml chicken bouillon
• 55 gr butter
• 50 gr celery
• 2 gr parsley