Drain the beans aggressively — press them in a colander with a plate. Watery beans are the single reason this dish ever goes soupy.
Soy sauce is in the 1955 original, not a modern twist. It reads as savory depth, not as soy.
Hold the topping onions until the last 5 minutes. Added early, they go limp and taste steamed.
Serve it beside roast turkey, mashed potatoes and gravy, stuffing and cranberry sauce.
Assemble up to a day ahead without the topping, refrigerate, then add 10 minutes to the first bake.
Leftovers keep 3 days covered in the refrigerator. Reheat uncovered at 350 F and refresh with a handful of new fried onions.