Here's what I'm ending up making: Ricotta Pound Cake, Lemon Curd, brownies and...
First, thank you all for your wonderful suggestions!
Ok, after much hemming and hawing for some unknown reason I have a plan.
I really wanted to do a lemon tart, but I don't happen to have a tart pan and I'd have to go to the worst mall to get to the only place with one in stock. Then I'd need to make several because: only one pan and 20+ people. Also, the panna cotta and some other ideas would need to take up space in my SIL's fridge, so nixed that.
So to still put some Meyer lemons off my tree to use, and a nod to the Italian theme, I'm making
a couple of Ricotta Pound Cakes from Dolce Italiano that Traca recommended served with
Lemon Curd and sliced fresh strawberries. I'll likely make a few chocolate covered ones as garnish for the platter too.
In addition, a batch of kid friendly
Baker's One Bowl Brownies cut into heart shapes as an homage to Valentine's weekend.
As for my non-dairy person, I'm going to make either strawberry/lime or raspberry sorbet, or a coffee granita (or maybe the granita too as it's been awhile since I've made some and now I'm kinda craving it). The sorbets/granitas/curd are super easy to make in the Vitamix, so that'll be easy-peasy.
Already hit the store, to tomorrow we bake! Thanks everyone!