If you're cooking shrimp, you'll need toinger and ginger. An excellent source of calcium. Cook, stirring occasionally, until cheese is melted and bubbly. For food safety and quality follow these cooking instructions. How long do you cook a thawed Stouffers lasagna? While most lasagnas can be cooked without a baking sheet, you may want to use a plastic tray if possible. The instructions for thawed Stouffers Lasagna may vary depending on how long the lasagna has been out of the freezer. A properly cooked lasagna will be moist, with a bubbling border and bubbling cheese. You will need to plan probably about 90 minutes of baking time if you are going to bake it from a frozen state. } Is it safe to defrost food in the microwave? No, you should not thaw lasagna at room temperature. The noodles are cooked in a boiling water bath before being served.If the lasagna watery consistency is noticed, it might be because of either the inadequately made lasagna or incorrect cooking times.