Preparation:
   • First mix the marinade, adding ingredients in the order given.
   • Remove stems from shiltake mushrooms and slice the caps. If using dried shiitakes, soak whole mushrooms for 1/2 hour in water to cover, then bring to boil in soaking water with a tablespoon or so of soy sauce. Reduce to simmer and cook for 20 minutes or until tender. Then remove stems and slice.
   • Cut the tomato into small cubes.
   • Mince shallot.
   • Slice the scallion into small pieces.
   • Preheat oven to 375.
   • Place lamb in marinade for five minutes or so, turning to ensure even absorption.
   • Brown the lamb on both sides in a saute pan over medium heat. Then place in a baking pan (a pie plate works) in preheated oven for ten minutes or more depending on how rare or well you like your lamb.
   • Deglaze the saute pan with a splash of sake or water.
   • Add mushrooms, shallots, scallion, garlic and capers, stirring quickly for a minute or so. Add butter and remove from heat.
   • When lamb is done, spread the shiitake mix across it diagonally and serve with accompaniments, such as potatoes, pasta, rice, salad, bread, etc.