Heat the oil in a large nonstick skillet or wok over medium-high heat.
Add the bell pepper strips, season with a pinch of salt and pepper, and increase the heat to high.
Cook, stirring occasionally, for about 10 minutes until the peppers are tender and begin to brown at the edges.
Add the chilled rice to the skillet. Use your hands or a spatula to break up any large clumps.
Stir-fry for about 10 minutes, continuing to stir, until the rice is heated through and slightly crispy.
Drizzle the soy sauce and sesame oil over the rice.
Stir everything together to combine evenly.
Taste and adjust the seasoning with more soy sauce, salt, or pepper if needed.
Serve immediately.
Don't overcrowd the pan. If you're doubling the recipe, cook in two batches to ensure the rice fries properly rather than steams.