However, they're usually used in this Japanese soup like dish. Here's a version I tried of it.
You'll need those sprinkles though it's fine without.
Broth: Either a good green tea (traditional), a light miso type broth, or another tea. I used oolong, and read that someone loved using that Korean Barley tea for this. This needs to be very very hot.
Green things: Spinach, kale, lettuce, or some other fast cooking green can just be sliced thinly. Thawed frozen veggies like green beans or peas would also work.
Meat: Scallops, shrimp, bits of barbecued pork, chicken, leftover stirfry - all this should be precooked.
Toppings: Sesame seeds, egg pancake (1 egg, salt or soy sauce or fish sauce, stir as if to scramble, try to fry as a flat pancake, slice thinly into shreds), kimchee, green onion thinly sliced. If you don't fear salmonella, try adding a raw egg to this.
Rice: Either 1 scoop of hot rice per bowl, or toss the rice into a pan and fry the bottom until lightly browned to encourage crispness. A hot stone bowl (or a bowl heated in the oven) could also work, but I didn't try it.
Flavor enhancers: try a mix of 1 tsp soy, 1/2 tsp chili sauce, 1/2 tsp sesame oil
To assemble, pop your toppings, greens, meat, toppings, and the rice in a bowl. Pour the hot tea / broth over the top and add your sprinkles. Eat as quickly as possible.