Slice the zucchini into 2-in (5-cm) sections. Make a well about ¾ in (2 cm) deep at one end of each zucchini section. Dissolve the salt in the water and soak the zucchini for about 30 minutes.
Combine the Marinade ingredients in a bowl and mix well. Add the beef and mushroom to the Marinade, mix until well blended and allow to marinate for 20–30 minutes. Heat t