Step #1 Steam Brussels sprouts until almost tender, about 8 mins.
Step #2 Set them aside.
Step #3 Meanwhile, shaking skillet every once in awhile, until lightly toasted, cook the walnuts, in a nonstick skillet over high heat, about 1-2 mins.
Step #4 Remove from skillet & set aside.
Step #5 In same skillet, heat oil over medium-high heat.