To make forward you possibly can dry out the bread 1-2 days forward. Retailer the bread in a sealed bag or container till you’re prepared. You’ll be able to cook dinner the onion combination 1-2 days and advance and retailer it within the fridge. You’ll be able to bake the stuffing forward of time, cowl with foil then reheat within the oven at 350 F for 10-Quarter-hour earlier than serving. You’ll be able to assemble the complete casserole, up till the purpose of baking, then cowl and place in your fridge tightly coated for 1-2 days. Take away from fridge 45 minutes earlier than baking (to return to room temperature).
Leftover stuffing will hold in an hermetic container or tightly wrapped within the casserole dish for as much as 4 days within the fridge. Reheat within the oven for a crisp texture or within the microwave if you happen to don’t thoughts it being softer.