Brown gravy is often made with a blonde roux ... kind of pure starch — corn starch is the easiest one to find in American grocery stores, but potato starch, sweet potato starch, and arrowroot ...

1 package of American Wagyu Black tenderloin or Beef tenderloin pieces 2 russet potatoes, hand-cut into fries 8 oz fresh squeaky cheese curds (see note) Chopped fresh parsley for garnish ...