Can I make this ahead of time?
Yes. Assemble the casserole up to 24 hours ahead, cover, and refrigerate. Add 10–15 minutes to bake time if baking cold.
Can I use frozen spinach instead of fresh?
Yes, but thaw and squeeze out excess moisture first to prevent a watery casserole.
Do I need to cook the orzo beforehand?
No. The orzo cooks directly in the casserole dish as it absorbs the chicken stock during baking.
What if I don't have heavy cream?
Substitute with half-and-half or use 3/4 cup milk mixed with 2 tbsp butter for a lighter version.
How do I know when it's done baking?
The orzo should be tender, the liquid mostly absorbed, and the cheese melted and lightly browned on top, typically 25–30 minutes at 375°F.