Braised Squab In A Mold Of Vegetables

• 4 squabs
• 3 1/2 in diameter (inches)
• 2 1/2 by
• 1 onion
• 1 broccoli
• 1/4 larger (slightly)
• 550 gr turnips
• 500 gr carrots
• 425 gr butter
• 475 ml stock