Since she absolutely loves sweets and now is even willingly open to trying out new varieties of her old favorites, perhaps starting with teaching her how to bake desserts might be better encouragement to learn cooking instead of going straight for the boring old meat and veggie meal prep?
If Raiden Shogun is Raiden Mei's ancestor it would be hilarious for them to meet each other, due to the fact that Raiden Mei is the best cook in Schicksal.