Classic Chicken Gumbo From Tony Burke

• 8 tomatoes
• 2 onions
• 2 ribs celery
• 1 green bell pepper
• 1 bay leaf
• 1 broiler-fryer chicken
• 1/2 okra
• 1,200 ml warm chicken broth
• 60 gr rice (uncooked)
• 24 gr vegetable shortening