sentence: combine chicken stock with black bean paste chilli beans rice wine sesame oil and dark soy sauce sentence: heat sichuan peppercorns sentence: finely ground the peppercorns sentence: heat cooking oil and fry sichuan peppercorns and chilli flakes sentence: strain the oil sentence: heat the infused oil add ground beef and stir fry till it turns brown sentence: add ginger garlic and onions and cook sentence: add sauce and and bring to boil and mix the starch with warm water sentence: reduce the heat and add tofu mushroom strips and scallions aand cook sentence: sprinkle with ground sichuan pepper and serve with rice