Merlot Pot Roast with Horseradish Smashed Potatoes

Bahan-bahan (8 porsi)

• One 3½-pound tied, fat-trimmed boned beef chuck roast
• freshly ground black pepper
• 1 tablespoon butter or olive oil
• 3 large carrots, (peeled)
• 1 medium onion, (chopped)
• ⅔ cup chopped celery
• 3 medium garlic cloves, (minced)
• ½ teaspoon dried thyme
• ¼ teaspoon black peppercorns
• 1 whole dried bay leaf
• 1 cup Merlot or other dry red wine
• ⅓ cup canned tomato paste
• 1½ tablespoons cornstarch
• 3½ pounds russet potatoes
• 1 to 1½ cups half and half cream
• 2 tablespoons butter
• salt and freshly ground black pepper, (to taste)
• 1 to 2 tablespoons prepared horseradish
• chopped fresh Italian parsley