Tamales make a tasty dinner dish any night of the week. They are packed with flavor and can be filled with any ingredients you choose. This recipe for Tamales au Gratin are both savory and creamy. The ingredients include tomatoes, onions, garlic, salt, ground black pepper, tamales, roasted, peeled and sliced poblano chilies, and mozzarella cheese. The taste will melt in your mouth and become a family favorite.