I know that when he catches you he says "you so terrible chef. i should to punish you, and punish is...BOILING IN THE CAULDRON!" then he says something else i cant understand.
ok so with our information lets make a complete sentence. you are a terrible chef, i should to punish you, and the punish is... BOILING IN THE CAULDRON! I SHALL MAKE YOU MY HOT SAUCE! which i think is very close to what he actually says
edit, i watched a video of it, and i think it actually says I SHALL BOIL AND COOK YOU IN MY HOT SAUCE. not quite sure. but i think were close