Ultimate Green Bean Casserole

Can I prepare green bean casserole the night before?
You absolutely can prepare green bean casserole the night before with three easy modifications/tips:

Add your fried onion topping on the day you plan to bake the casserole: Fried onions are meant to be a crisp topping on your casserole. If you add them to the top before placing in the fridge overnight, then you run the risk of those onions being soggy when you bake the dish the following day. And no one wants soggy French fried onions.
Place all of your mixture in your baking dish and wrap it airtight with plastic wrap. You want to make sure it is airtight so the mixture does not dry out.
You will want to adjust your baking time since the casserole will be starting from a cold state. I recommend adding 5 minutes to your baking time to begin with, but check that the dish is baked through when your timer goes off. If it’s not quite done, simply pop it in the oven for another 3-5 minutes until it is hot and bubbly throughout. And keep in mind that you’ll want to start the cold dish in a cold oven or allow the dish to come to room temperature before putting it in the pre-heated oven. Putting a cold dish in a hot oven could cause it to shatter.