Flake the cooked salmon into bite-size pieces and set aside. Separate green onion whites from greens.
Heat 1 tsp neutral oil in a large skillet over medium. Pour in beaten eggs and softly scramble. Transfer to a plate.
Add remaining oil to the pan. Sauté green onion whites, garlic, and ginger until fragrant, about 30–45 seconds.
Stir in mixed vegetables and cook until warmed and lightly tender, 2–3 minutes.
Add cold rice. Break up clumps and stir-fry. Press rice into the pan and let it sear for 1 minute.
Pour in soy sauce and rice vinegar. Toss to coat, then fold in flaked salmon and sesame oil.
Return eggs to the pan. Add green onion greens, white pepper, salt, and sriracha if using. Toss and serve hot.