STEP 1 Prepare the celery by removing the leaves and washing the stalks. Cut the stalks into 4-6cm pieces and set aside. STEP 2 Slice the tofu and pan fry with 1 tsp oil until golden brown. Put on a plate. STEP 3 Prepare the celery by washing and then slicing into strips similar in size to the celery. STEP 4 To cook, add a tablespoon of oil to a hot wok and coat all sides. Add the peppercorns, peppers, ginger, and spring onion and stir fry for a few seconds then add the celery strips and salt then stir for half a minute and add the tofu. Stir until all the ingredients are mixed and let cook for a few seconds before serving.