02Roast turkey 1 hour. Add tomatoes to pan. Roast 1 1/2 hours longer, stirring tomatoes occasionally. Pour broth into pan. Cover turkey loosely with foil. Roast until thermometer inserted into thigh registers 180°F, basting occasionally with pan juices, about 1 hour 50 minutes longer if unstuffed or 2 hours 20 minutes longer if stuffed. Transfer turkey to platter. Tent with foil; reserve pan juices.
03Bring 5 cups chicken broth and porcini mushrooms to boil in medium saucepan. Remove from heat; let steep 15 minutes. Transfer mushrooms to work surface; reserve mushroom broth. Chop mushrooms coarsely. Mix 2 tablespoons butter and flour in small bowl to smooth paste. Strain juices from roasting pan into large measuring cup; spoon off fat. Add enough reserved mushroom broth to pan juices to measure 6 cups. Add wine to roasting pan and bring to simmer, scraping up browned bits; add to broth.
04Melt remaining 2 tablespoons butter in large saucepan over medium-high heat. Add garlic and sauté 1 minute. Add parsley, thyme, rosemary and mushrooms. Sauté until mushrooms are tender, about 4 minutes. Stir in broth mixture and simmer until slightly reduced, about 30 minutes. Gradually whisk in butter-flour paste. Boil until reduced to 4 cups, stirring occasionally, about 12 minutes. Season with salt and pepper.