It seems there already are bad feelings.
If you made it at her house, why would you expect to take it home? Is there a backstory here I'm missing?
Well, I'd take it home because I made it. She was supposed to teach me how, so that I could make it.
And now you've been taught. Why don't you just make another batch, and tell her to keep hers in the freezer?
Because that would create bad feeling.
I don't agree with this. It's not about bad feelings, and Toots just stated a few posts above that her MIL is a lovely person and they have a good relationship
. It's more about what boundaries need to be set, and when they get set.
Toots, I think you've figured this out already. Your MIL is having a little trouble ceding her holiday role over to you. I think once it's all over and you can look back, you'll see pretty clearly what needs to be stated more firmly next time, and what isn't a hill to die on.
I, too, think the meal sounds awesome. Lyonnaise potatoes! Yum.