Why would ever want to grill a regular manjuu when you have a yukkuri available? Yukkuri will toast themselves evenly on all side in their stupid death throws, and if you don't enjoy the screaming, you can just rip out the tongue before sizzling.
It's like how French call that disgusting thing a gourmet. As for Miss' lil bro, he doesn't like eating a trashing and writhing trash. Yeah, it's like eating maggots.
A lot of "disgusting" foods are often treated with special care before being prepared for human consumption. Wild escargot are feed a special diet before cooking. Maggots are expunged in boiling water as to remove impurities.
If miss got another pet shop bargain, I don't think she has too much to worry about. Li'l bro just needs to expand his culinary horizons.