Spread shrimp in a shallow, aluminum foil-lined pan.
Combine butter and next 12 ingredients in a saucepan over low heat, stirring until butter melts, and pour over shrimp.
Cover and chill 2 hours, turning shrimp every 30 minutes.
Turn out into a well seasoned iron skillet and bake, uncovered, at 400° for 20 minutes; turn once.
Serve with the heated french bread, right from the iron skillet.