01 -
Combine soy sauce, mirin, and dashi stock in a medium saucepan. Heat gently over medium heat to blend flavors.
02 -
Add sliced onions to the saucepan. Simmer until onions are soft and translucent, about 5 minutes.
03 -
Add thinly sliced beef to the pan. Gently stir to separate slices and simmer until just cooked and tender.
04 -
Spoon cooked rice into individual serving bowls. Layer beef and onions on top, allowing sauce to drizzle over the rice.
05 -
Sprinkle shredded cheese evenly over the hot beef and rice. Let the residual heat melt the cheese, or place bowls under a broiler for 1-2 minutes until cheese is golden and bubbly.
06 -
Optionally garnish with chopped green onions, sesame seeds, or onsen tamago. Serve immediately while hot.