What should I actually eat at a family meal that falls during a fast?

That is different than a Western American family who just likes to eat meat, but eat meat every day. Right? So what I would recommend is, bring some fish to cook and just eat some fish. It's Saint Herman of Alaska. You can eat fish on that day. Eat fish, enjoy it, stay away from the meat and dairy, and just live your faith. Some people will like it and understand it, and some people won't. At the end of the day, we can't do everything for other people. Some people will understand us, but some people won't understand us, and that's okay also.