Cook your noodles according to package instructions until al dente. Drain and set aside. I like to toss them lightly with a bit of oil to prevent sticking while preparing the sauce.
In a large skillet, brown the lean ground beef over medium-high heat. Break it apart as it cooks, ensuring it’s evenly browned with no pink remaining.
Add minced garlic and ginger to the skillet and sauté for a minute until fragrant. Stir in soy sauce, hoisin sauce, beef broth, and brown sugar. Simmer until the sauce thickens slightly.
Mix cornstarch with water to create a slurry, then pour it into the simmering sauce. Stir constantly for 1-2 minutes until the sauce reaches a glossy, thick consistency that coats the beef perfectly.
Add the cooked noodles to the skillet and toss everything together until the noodles are evenly coated in the sauce. Finish with sliced green onions for freshness and color.