Stuffed mushrooms recipe a la france

Ingredients

• 8 - 10 large gourmet mushrooms
• 6 Tablespoons bread crumbs (unseasoned)
• 6 Tablespoons minced yellow onion
• 3 Tablespoons minced green onion
• 4 - 6 Tablespoons half and half or heavy cream
• 8 Tablespoons fresh parsley, minced
• 1 teaspoon tarragon
• 3 Tablespoons butter
• 1 Tablespoon oil
• 1/2 cup grated parmesan cheese
• 1/2 cup shredded Swiss cheese
• salt and pepper to taste