Combine the soy sauce, hoisin sauce, sesame oil and chili garlic sauce in a bowl and whisk to combine. Set aside.
Heat the olive oil in a pan over medium heat. Add the mushrooms and a pinch of salt & pepper and toss to combine. Cook the mushrooms for 5 minutes, or until they start to brown on the edges.
Add the garlic, ginger, whites of the green onions, bok choy and 1/2 of the sauce to the pan and stir to combine. Cook for 2-3 minutes, or until the bok choy starts to wilt. Add the rice and remaining sauce and stir until heated through.
Right before serving, add cilantro, the remaining green onions and sesame seeds.
Video
Notes
*If you don't have leftover rice, cook 1 cup of dry rice from scratch then spread out on a baking sheet and place in the freezer for 10 minutes to cool.