The best restaurants serving American food in Vassall Lambeth London

Nice venue, nice staff and good service, but dire Sunday lunch (two Sundays in a row: we'd thought the first must be a one-off bad experience); and given that's what we were there for, we won't be back: chewy slices of beef; very fatty, gristley and 20% inedible lamb; roast potatoes completely uncrisp, big and flabby; undercooked parsnips; Yorkshire pudding dried-out to a crisp; leaving ok carrots and gravy!