In small bowl, combine the mushrooms with hot water to cover and set aside to soak.
Meanwhile, in shallow bowl, combine flour, salt and pepper. Dredge the turkey thighs in flour mixture to coat.
Heat oven to 350°F. In 12-inch skillet, heat 3 tablespoons oil over medium heat. Add coated thighs to oil; cook 12 to 15 minutes, turning once, until well browned. Place in ungreased 13x9-inch (3-quart) glass baking dish; set aside.
In same skillet, heat remaining 1 tablespoon oil over medium heat. Add onion, carrots, celery and garlic to oil; cook 5 minutes, stirring occasionally. Add 1 tablespoon rosemary, bay leaf, 2 tablespoons parsley and the wine; continue cooking about 5 minutes, stirring occasionally, until vegetables are tender and most of the liquid has evaporated. Stir in the lemon peel strips, tomato paste and broth. Drain mushrooms; discard the liquid. Add mushrooms to skillet. Heat to simmering then pour over the turkey in baking dish.
Cover baking dish with foil and bake 1 1/2 to 2 hours or until the turkey is very tender.
Meanwhile, make the gremolata. In 8-inch skillet, melt butter over medium-high heat. Add bread crumbs to butter; cook until lightly browned, stirring frequently. Stir in 2 teaspoons parsley, 1 teaspoon rosemary and the grated lemon peel.
Sprinkle gremolata over the turkey before serving. If desired, serve with polenta or risotto.