Mince the garlic cloves finely and slice the green onions, separating white parts from green parts for different cooking stages. If your rice isn't already chilled from the day before, spread it on a plate and refrigerate it for at least 30 minutes—cold rice grains stay separate and won't turn mushy when fried. This is the most important trick for perfect fried rice texture.

In a small bowl, whisk together the soy sauce, brown sugar, sesame oil, and pepper flakes until the sugar dissolves completely. Set aside. This creates your flavor foundation and prevents lumps from forming when it hits the hot pan.

Heat the oil in a large skillet or wok over medium-high heat until shimmering. Add the minced garlic and cook for about 30 seconds until fragrant, then immediately add the ground beef, breaking it apart with a spoon as it cooks. Once the beef is browned and cooked through (about 4-5 minutes), pour in the sauce mixture from Step 2 and stir constantly for 2-3 minutes to coat all the meat evenly and allow the flavors to meld. The beef should be glossy and caramelized at this point.

Add the chilled rice from Step 1 to the pan with the beef mixture, breaking up any clumps with your spoon. Stir-fry for 2-3 minutes over medium-high heat, tossing everything together until the rice is heated through and evenly coated with the sauce. I like to keep the heat high enough that you hear the rice sizzling against the pan—this adds a subtle toasted flavor without burning anything. In the last 30 seconds, add the white parts of the green onions and toss once more.

Transfer the fried rice to a serving dish or individual bowls and top with the reserved green parts of the green onions for a fresh, bright finish.