This is your traditional casserole that you take to Thanksgiving and Holiday dinners.
Actually, it is better. It doesn't give anyone the onion or MSG headaches*.
-be sure swap migraine-friendly leeks for migraine-trigger onions.
-be sure to make sure your stock is MSG free
-use a little less liquid to make your soup a bit thicker
Steam the green beans.
Cut up a leek in onion-thick slices and fry them to put on top.
Take out your casserole dish and place in the green beans, pour over the lovely mushroom soup and top with crispy leeks rings.