Prep the rice: If using fresh rice, spread it on a sheet pan and chill for 30–60 minutes.
Cold rice fries best.
Slice the beef: Cut thinly across the grain. Pat dry and toss with a pinch of salt and black pepper. For extra tenderness, marinate in 1 teaspoon soy sauce and 1/2 teaspoon cornstarch (optional) for 10 minutes.
Beat the eggs: Lightly season with a pinch of salt.
Set aside.
Heat the pan: Use a large skillet or wok. Add 1 tablespoon neutral oil over medium-high heat until shimmering.
Cook the beef: Add beef in a single layer. Sear 1–2 minutes per side until just cooked.
Remove to a plate. Do not overcook.
Scramble the eggs: Add a small pat of butter. Pour in eggs and gently scramble until just set.
Slide eggs to the plate with the beef.
Sauté the aromatics: Add 1 tablespoon oil and 2 tablespoons butter. When foamy, add garlic. Stir 20–30 seconds until fragrant, not browned.
Fry the rice: Add the cold rice.
Break up clumps. Let it sit 30–45 seconds to crisp, then toss. Repeat for 2–3 minutes to get some toasty bits.
Season: Add soy sauce and oyster sauce (if using).
Toss to coat evenly. Adjust to taste.
Add veggies: Stir in peas and carrots. Cook 1–2 minutes until warmed through.
Finish with beef and eggs: Return beef and eggs.
Add green onions. Splash in rice vinegar and sesame oil. Toss and taste.
Add more butter (1 tablespoon) if you want a richer finish.
Serve: Top with extra green onions, black pepper, and chili oil or red pepper flakes if you like heat.