but alas, this is what we were dealt with - a chuck rump roast.  I recommend this recipe 20-30min HP NPR for a poorer cut of meat.  boneless eye round is preferred, at 15min HP NPR

anyway.. onto our sandwich

thickly sliced roast and sourdough are toasted together

atomic horseradish, mayo, sliced radish, and romaine lettuce are added

sliced and served