Can you make it a day ahead, or is it best the day it's made?

I like it out of the oven with a "rest" of 10-15 minutes to allow flavors to come together and make for easier serving.

Thanks, AJ!

I made it last weekend and then had some leftover the next day. It's much better right out of the oven, in my opinion. You could prep your ingredients (including cooking the corn + scallions) the day before, to save time. ;o)