Beef Baked In A Barrel

• 18 mushrooms (fresh)
• 3 garlic (cloves)
• 2 pineapples
• 2 onions
• 1 mandarine orange segs (canned)
• 3/4 pineapple on sides
• 900 gr beef chuck (ground)
• 375 gr pineapple (diced)
• 350 gr rice (cooked)
• 250 gr pineapple (diced fresh)