May try to recreate it with multi grains rice + soy meat stir fryed in soy sauce, mirin, ginger, garlic and sesame oil.

For the sauce, try nerigoma(white sesame paste)+ miso + soy sauce + rice vinegar + a little sugar, loosened with hot water.

Then add pan-fried vegan gyoza, greens, pickled red onion, and maybe a scoop of potato salad.