Prepare the dashi stock by combining the dashi powder packet and water in a pot. Bring to a boil for 4-5 minutes. If using dashi powder, skip this step.
**This recipe yields two beef rice bowls. Be sure to divide the recipe ingredients in half since each bowl will need to be prepared separately. **
In a bowl, combine all the seasoning sauce ingredients.
Heat a pan with neutral oil over medium heat. Add onions and cook for 1 minute. Next, add the garlic and cook for another minute.
Add dashi stock and seasoning sauce. Simmer for 2-3 minutes then add thinly sliced beef. Cook for 2 minutes or until the beef is fully cooked. Turn off the heat and drizzle sesame oil on top.
Transfer cooked beef over a bowl of cooked rice, making sure to leave the sauce in the pan. Bring the sauce back up to a boil over medium heat for 1-2 minutes until slightly reduced. Pour the sauce over the beef.
Repeat for the second bowl.
Garnish with scallions and runny egg. Serve and enjoy!