In plastic bag or mixing bowl, combine all ingredients except steak and mushrooms.
Add steak and mushrooms.
Turn or stir to coat with marinade.
Let stand at room temperature for 2 hours or in refrigerator overnight.
Drain and set aside.
Thread meat and mushrooms on skewers.
Broil 3 to 4 inches from heat, or grill over hot coals, turning occasionally, until of desired degree of doneness.