Cut the radish into thin 1-inch squares. Cut the zucchini into bite size pieces. Thinly slice the onion and chili pepper. Cut the scallion into 1-inch lengths.
Cut the tofu into 1/2-inch thick slices. Slice the meat into thin strips.
Preheat a small pot. Sauté the meat until no longer pink. Add the radish and continue to sauté until the radish is wilted.
Add the tofu, onion, zucchini and garlic. Boil for an additional 5 to 6 minutes. Stir in the vinegar, and throw in the scallion and chili pepper. Cook for another minute or two.