Cook the Spaghetti: Bring a large pot of salted water to a boil. Add spaghetti and cook until al dente, about 8-10 minutes. Reserve 1/4 cup of pasta water, then drain.

Brown the Ground Beef: In a large skillet over medium-high heat, add ground beef. Brown for about 5-7 minutes, breaking it apart. Drain excess fat.

Sauté Garlic and Ginger: Reduce heat to medium, add minced garlic and grated ginger. Sauté for about 1 minute until fragrant.

Create the Sauce: Add soy sauce, chili oil, brown sugar, and rice vinegar. Stir and simmer for 2-3 minutes until slightly thickened.

Combine Spaghetti and Sauce: Toss cooked spaghetti into the skillet with the sauce. Mix until every strand is coated. Add reserved pasta water if needed.

Add Finishing Touches: Turn off heat and drizzle sesame oil over spaghetti. Fold in green onions and sesame seeds.

Serve and Enjoy: Plate the spaghetti hot. Optionally drizzle with more chili oil or sesame seeds. Enjoy your meal!