If you have some vitello tonato leftovers, you can cut the meat in smaller pieces and mix them with freshly cooked pasta. You can add some fresh chives or parsley to give it a bit of another taste and color.
Here the recipe for vitello Tonato:
https://yannisandstella.travel.blog/2020/10/08/vitello-tonato/
Yannis and Stella @Apollon, Naxos 