Heat about 1 tbsp oil. Saute garlic and ginger until fragrant, add chicken, boiled egg and tofu, mix well. Pour water, mix well and cook until boiling. Add star anise, oyster sauce, soy sauce, sweet soy sauce and pepper. Mix well and cook until boiling and the sauce thickened. Add sesame oil, mix well. Taste it, add salt / sugar if necessary. Turn the heat off and set aside.