This version streamlines the process so that it can be on the table in less than half an hour. Serve this on its own or over hot cooked rice or noodles.
In a measuring cup, combine the arrowroot or cornstarch with a small amount of water and stir to dissolve. Add enough additional water to fill to the ½ cup level. Transfer to a small bowl.
Add the remaining sauce ingredients to the bowl and stir together. Set aside.
Cut the well-blotted or press tofu into approximately ½-inch dice.
Heat the oil in a stir-fry pan. Add the tofu and stir-fry for several minutes, until most sides are golden.
Add the garlic, broccoli, and bell pepper and stir-fry until the broccoli is bright green.
Add the celery and scallions and continue to stir-fry until all the veggies are tender-crisp.
Stir up the sauce, then stir it into the pan. Stir-fry just until it thickens.
Serve at once. Pass around any of the garnishes (note — dried hot chile peppers are a traditional addition to this dish, but they are HOT!) as well as extra soy sauce.