Traditionally, Chinese braised tofu and vegetables would be cooked in either a clay pot or wok, but we use a nonstick skillet. The wide surface area is well-suited to searing the tofu before simmering with the vegetables. To make this dish vegetarian, use hoisin sauce instead of oyster sauce. And if you wish to spice it up, drizzle on some chili oil instead of or in addition to the sesame oil when cooking is complete. Serve with steamed jasmine rice.