Food prepared for Yomtov should not be eaten before Yomtov. It’s easy for men to say “she’ll cook some more”. What happened with self-control? Don’t they teach these things in Yeshiva nowadays?
If you’re hungry before Yomtov, make yourself a peanut butter sandwich and get out of the kitchen so you won’t be tempted (unless you’re the one peeling the vegetables of course).