The easiest way is to blow off the rice when there's only 1 or 2 squared used. He'll have to restart, wasting precious turns
The lizardfolk could be able to scarf an arm down as an action or maybe even a bonus action, but that dwarf might need some prep time
I'd recommend mods unless you also like being pegged by bugs and crashes. Also possibly something to help with combat, it's a little jank when not using V.A.T.S.I got the game free on epic, which meant i got shafted by bugs :)
For free???