Melt 1 tbsp butter in a large skillet over medium heat. Add the whisked eggs, stirring constantly to create soft, fluffy eggs. Once set, remove from the skillet and set aside.
Add 1 tbsp olive oil to the skillet, toss in the diced onion, and let it sizzle for 2 minutes. Add the minced garlic and cook for another 2 minutes.
Add the ground beef to the skillet, breaking it apart with a spatula. Cook until browned and the liquid evaporates. Mix the sauce ingredients and pour 2 tbsp of sauce over the beef. Cook for 2 minutes.
Stir in the mixed vegetables and allow the beef to caramelize a bit for those golden-brown edges.
Add the day-old rice and pour the rest of the sauce over it. Mix well. Press the rice down slightly, letting it sit to form crispy bits. Stir and repeat this process to get those crispy edges—don’t let it burn!
Gently fold the scrambled eggs back into the skillet and sprinkle with green onions. Serve hot and enjoy!