01 - Prepare spaghetti in a large pot of boiling salted water until al dente. Drain thoroughly, drizzle with olive oil to prevent sticking, and set aside.
02 - In a mixing bowl, combine soy sauce, honey, vinegar, sesame oil, and chili flakes. Whisk well until the honey dissolves and the mixture is smooth.
03 - In a large skillet over medium-high heat, sauté minced garlic in a small amount of oil until fragrant. Add ground beef, season lightly with salt and black pepper, and cook until deeply browned, using a spatula to break up any large pieces.
04 - Pour the prepared sauce over the beef. Stir to coat evenly and simmer for 5 to 7 minutes, stirring occasionally, until the liquid reduces to a glossy, sticky glaze.
05 - Add the cooked spaghetti and finely sliced green onions to the skillet. Toss thoroughly over low heat until the pasta is evenly coated and heated through.
06 - Transfer to plates or a serving dish. Sprinkle with sesame seeds and extra green onions if desired. Serve immediately.