Preheat oven to 375 degrees F.
Remove and discard all of the stems from the Portobello mushrooms and place in a baking dish.
In a separate bowl, combine all of the remaining ingredients and mix well. Place a large spoonful of the mixture on top of each mushroom. Place in oven and bake for 20 minutes.
Serve on a bed of lettuce or on a platter and drizzle the Worcestershire sauce around mushrooms.
Recipe courtesy of Oscar Flo, Virgin Club House