That stoic kaga feeding akagi is a sight to see..

Anyhow, I don't understand the joke (I'm stupid).. I can't seem to follow RJ's language style in panel 2 (she said they were cleaning the garden?), and Houshou's explanation in panel 3 seems really unrelated.

ChibiAkaKaga couldn't wait for the food to actually roast up in the leaves, so they snatch it right out of them - which is one of the stereotypical martial-arts training methods (you have to move fast enough to not suffer burns). It's traditional in Japan to use swept-up leaves to burn them to roast potatoes; the chestnuts will be on coals or similar.

The word that RJ uses for 'training' refers specifically to ascetic/martial-arts training, not vocational.

Paracite said:

ChibiAkaKaga couldn't wait for the food to actually roast up in the leaves, so they snatch it right out of them - which is one of the stereotypical martial-arts training methods (you have to move fast enough to not suffer burns). It's traditional in Japan to use swept-up leaves to burn them to roast potatoes; the chestnuts will be on coals or similar.

The word that RJ uses for 'training' refers specifically to ascetic/martial-arts training, not vocational.

Ahhh that explanations makes sense, the conversation between RJ and Houshou in panel 2 confused me, What I get is:

Panel 2:
RJ: why did you roast the potatoes and chestnut? weren't you cleaning the garden?
Panel 3:
houshou : Akagi and kaga interested in the potatoes and chestnuts, so they roasted it

Maybe that question from RJ in panel 2 makes me confused, is it a dialect thing?