Ingredients

• 2 tablespoons butter
• 4 shallots or 4 green onions, chopped
• 1 -1 1/2 cup sliced mushrooms (fresh or canned)
• 1/2 lemon, juice of
• 1/4 cup white wine
• 1/4 cup heavy cream (whipping) or 1/4 cup half-and-half
• 1/2 cup grated gruyere cheese
• cayenne
• 1 teaspoon cornstarch, dissolved in
• 1 tablespoon cold water