Cook the pasta according to instructions on the packaging.
Cut the beef into thin slices.
Slice the spring onions diagonally into 1-1.5 inch pieces. Peel and slice the garlic.
Heat the oil in a large pan over medium-high heat and cook the beef for about 3 minutes, then transfer onto a plate and drizzle with soy sauce.
Add the garlic and spring onions to the same pan and cook for about 3 minutes, until spring onions start to soften.
Return the beef and soy sauce into the pan and add the hot stock and frozen beans. Cook for another 2-3 minutes, then add the cooked pasta. Stir occasionally for about 2 minutes.