Clean the asparagus & trim. Parboil for 2 to 3 minutes.
Dissolve the bouillon cube in 1/2 c water then add the cornstarch &
stir to dissolve.
Heat the oil in a wok over medium-high heat almost to the smoking
point. Add the garlic & brown it. Add the asparagus, mushrooms &
onions all at once. Immediately add the oyster sauce & dissolved
bouillon cube. Stir-fry for 3 minutes. Turn into a serving dish &
garnish with pepper.