Seafood Pasta with Sherry Tomato Cream Sauce

INGREDIENTS

• 1 pound shelled, cooked or raw bulk lobster pieces
• 1/2 pound shiitake mushrooms, stemmed and sliced
• 3 tablespoons extra-virgin olive oil
• 1/2 cup chicken stock or seafood stock
• Salt
• 1/2 cup dry sherry
• 2 large shallots, chopped
• 3 to 4 cloves garlic, finely chopped or grated
• 1 teaspoon lemon zest
• Salt and freshly ground black pepper
• A handful chopped chives or parsley or both
• A pinch or 2 crushed red pepper flakes
• 1 1/2 pound penne rigate or bow tie pasta
• 1/2 cup cream
• 1 (15-ounce) can crushed tomatoes