This recipe from Gourmet Magazine (RIP, sniff) is easy, fast, and takes advantage of pantry staples. I used low-sodium soy sauce and didn't add any of the additional salt, and the results were terrific.
Serve up some steamed broccoli and a tossed salad (try a citrusy vinaigrette) on the side. If you have a starch lover in your family add some lightly buttered egg noodles or rice. It's only 30 minutes from start to finish, yet it'll get raves from your crowd.