Prep everything first (mise en place). Beat the eggs + extra yolk lightly in a bowl. Dice onion, mince garlic, slice scallions (keep whites separate). Fluff chilled rice with a fork to break clumps.
Heat a large skillet or wok over medium-high heat until hot. Add the 2 tablespoons neutral oil and let it warm.
Add the scallion whites and diced onion. Stir-fry 1–2 minutes until fragrant and onion is translucent. Add garlic and any raw veg (mushrooms, bell pepper); cook 1–2 minutes more.
If using pre-cooked protein (Spam, ham, shrimp), add now to sear and develop color.
Add the chilled rice, breaking up any clumps and spreading it in the pan for a brief moment of contact to get light toasting. Toss or stir constantly for 1–2 minutes.
Drizzle in the ½ tbsp sesame oil and the tablespoon of soy sauce. Sprinkle the ½ tsp sugar over the rice and stir vigorously so each grain gets lightly coated.
Push the rice mixture to one side of the pan. If the pan looks dry, add a little more neutral oil (about 1 tsp). Pour the beaten eggs into the cleared space and let sit 10–15 seconds to start setting.
Gently scramble the eggs until about 70% cooked (soft and slightly wet). Toss and fold the eggs into the rice so they break into ribbons that coat the grains.
Stir in the scallion greens and taste; adjust seasoning with extra soy or pepper if needed. Add toasted sesame seeds and torn gim strips if using.
Remove from heat and finish with the remaining ½ tbsp toasted sesame oil drizzled over the top. Serve immediately — top with an optional sunny-side egg for a runny yolk finish.