My gluten-free, dairy-free fiancee made this last night. Super simple, and amazingly delicious. We used gluten-free breadcrumbs that added a nice crunch. Shallots are also recommended.

Can the bechamel be made ahead of time?

This one is generally best when you are planning on using it as the sauce gets quite thick as it sits. That being said you could try making it ahead and see how it works for you...just be sure to reheat it slowly over low heat. You may also need to add a bit more water to thin it out. Hope this helps!

I made this the other night and had left over sauce, decided to put the remainder sauce in the fridge to see if it can be made ahead of time. I added a bit of water and heated it slowly as you recommended and it worked. Thanks
I did notice though, the recipe calls for garlic powder, but it's not mentioned in the steps, I added it in with the yeast and salt.

Thanks for sharing your feedback Maureen, much appreciated. Also thanks for your sharp eye, I will fix the missing garlic powder in the text recipe. Cheers!

is the nutritional yeast powder form or liquid form? I have never heard of nutritional yeast and very interested in making this dish. thanks

Nutritional yeast comes in a powder-like form. Here is a link to some images of it. Cheers!

You can buy nutritional yeast at the Bulk Barn. I am in Ontario not sure if Bulk Barn exists in other provinces.

Good suggestion Maureen. As mentioned in the recipe, nutritional yeast is also available in most health food stores as well. It can also be ordered online. Cheers!

Nutritional yeast also seems to be a key ingredient in miso gravy, which is fabulous over sweet-potato fries.