Grilled Shiitake Mushrooms
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4 - 6 large shiitake mushrooms* - stems trimmed and brushed clean with a 
      paper towel
1/4 cup of fresh lemon juice, or juice from 2 lemons
1/2 cup of extra virgin olive oil
4 garlic cloves smashed (with the side of a knife), skins removed and 
  chopped fine
3-4 anchovy fillets
1 tablespoon of chopped fresh thyme
1 tablespoon of chopped fresh marjoram
Salt and pepper to taste

In a small food processor or blender, puree the lemon juice, olive oil and 
anchovies. Transfer to a bowl and stir in fresh herbs and season to taste 
with salt and pepper. Place marinade and mushrooms in a large bowl so 
marinade will cover the mushroom caps and marinate for at least 20 minutes 
and or up to 1 hour.

To Grill Mushrooms:

Place mushrooms over medium low heat on grill, gill side up. Grill 
mushrooms, until marked and softened about 4 minutes. Turn mushrooms and 
grill about 1-2 minutes (be careful as to not char the gills), until fork 
tender. Serve immediately.

*Use Portobello mushrooms if you can't find the large shitakes. 
Portobellos, depending on their size, will probably take longer to cook.

From: Organic Authority