Chicken& Vegetables With Gravy

• 3 potatoes
• 2 celery ribs in
• 1,800 ml broiler (whole)
• 200 ml water
• 40 gr flour
• 6 gr seasoned salt
• 5 ml soy sauce
• 1 gr coarsely black pepper (ground)
• 1 gr thyme
• 1 gr basil