Freshly made pasta layered between a rich meat sauce and topped with real mozzarella cheese. No preservatives. U.S. inspected and passed by Department of Agriculture. At Stouffer's, great taste begins with the highest quality ingredients. Taste the difference. Stouffer's lasagna is made with real mozzarella cheese. It's good to know. Did You Know: Stouffer's brings great taste to your table in over 90 products with no preservatives and 0 g trans fat per serving. Since 1866.