Think of egg foo yong as a cross between an American-style omelet and a crispy Chinese pancake, loaded with vegetables and topped with a savory mushroom “gravy.” It’s a superspeedy meal thanks to packaged broccoli slaw, matchstick-cut carrots, and microwaveable brown rice. A smaller (8- to 10-inch) skillet will make for a taller, fluffier pancake. […]