In case you can't eat all this fettuccine pesto try making it into another easy dinner. Try adding leftovers to a baking dish and then cover with fresh mozzarella slices. Bake at 350°F until the cheese is melted and any meat in your pasta is heated through again. Moreover, you can make a cold pesto pasta salad from the leftovers. Firstly, remove any leftover meat from the creamy pesto pasta. Then add sliced black olives, chunks of mozzarella, sliced grape tomatoes or cherry tomatoes, diced bell peppers or any other vegetables you want to add.