Peel, devein, and wash the shrimp. Pat dry. Prep the vegetables in advance, as this recipe goes quickly.
Season shrimp with 1/2 teaspoon salt, light soy sauce, sesame oil, Chinese cooking wine, and MSG. Mix well and set aside.
Heat stir-fry oil in a wok over medium heat. Add the onion and bell pepper. Cook for 3 minutes.
Add garlic and ginger. Stir and cook for 30 seconds.
Add bok choy and cook for 4 minutes, stirring occasionally. In the video below, I discuss other vegetables you can add to this stir fry.
Add mushroom soy sauce, oyster sauce, and remaining 1/2 teaspoon salt. Stir to coat vegetables.
Push vegetables to the side of the wok. Add the shrimp and cook for 2 minutes until they turn pink.
Combine everything in the wok. Cook for 1 more minute, then taste and adjust seasoning.
Serve hot with steamed rice or the coconut rice dish I shared with you a few years back.