Another recipe from Sunset's Chinese Cookbook. A lovely combo of flavors. Over the years we have changed the recipe to suit our tastes. Love it, love it, love it! Oh, by the way, you can also make this using beef or shrimp.
In a bowl, combine cornstarch, soy sauce, dry sherry and water. Add chicken and stir to coat, then stir in 1 1/2 tsp of the oil and let stand for 15 minutes to marinate.
Prepare cooking sauce and set aside. Wash asparagus and break off tough ends; cut in 1/2" slanting slices.
Heat a wok over high heat. When pan is hot, add 2 tbs of the oil. When oil begins to heat, add black bean w/garlic and ginger; stir once. Add chicken and stir-fry until chicken is opaque (about 3 minutes). Remove chicken from pan.
Add the remaining 1 tbs oil to pan. When oil is hot, add asaragus and onion and stir-fry for 30 seconds. Add the 2 tbs water, cover and cook stirring occasionally, until crisp-tender (about 2 minutes). Return chicken to pan. Stir cooking sauce, add to pan, and cook, stirring, until sauce bubbles and thickens.