Pat the shrimp dry and toss them with a bit of oil, a pinch of salt, and a pinch of pepper. (maybe a dab of sambal). Set aside
Mix the rice with soy sauce, beaten egg, oyster sauce, dark soy sauce, and Sambal chili sauce in a large bowl. Mix this very well, coating the rice.
On high heat, heat the wok until smoking hot. Drizzle in some cooking oil, and swirl it around. Add the shrimp. Stir for just a minute.
Once the shrimp change color, add the diced onion, ginger, chilies (if using), and garlic. Keep stirring until fragrant.
Add the diced vegetables and stir for a few minutes or until cooked; remove and reserve.
Reduce the heat to medium, drizzle more oil into the wok and add the rice
Stir over medium heat for a few minutes until the rice grains start to separate and take color.
When the rice becomes fluffy, return the shrimp and vegetables to the wok.
Add some diced scallions, and toss to combine.
Taste, season, and balance flavor