Happy Birthday nikari!!!
Was reading trektone's friend ohiblather's post on onigiri. Rice balls! Musubi! Definitely a comfort food. Growing up, picnics and car trips would not have been the same without nigi-nigi and either salami or shoyu fried weiners. Sometimes there would be umeboshi (pickled plum) or takuwan (pickled radish - very smelly!!!).
Rice balls can be very dense. Probably dense enough to put a dent in somebody's head if you threw it at them. *g*
I learned how to make them by watching Grandma and Mom. Bowl of hot rice. Hands have to be wet - with a bit of salt on them and then compress rice into an egg shaped ball. Sometimes they're wrapped in nori. Sometimes sprinkled with furikake (mix of nori, sesame and other stuff - there are many different kinds)
Comfort food... Maybe lunch. Don't have any salami nor weiners, but there's always spam!