2 lbs. beef (can use flank steak, chuck roast, brisket, sirloin tip or steak) 
1/2 tsp. seasoned salt 
1/3 tsp. garlic powder 
1/3 tsp. pepper 
1 tsp. MSG 
1 tsp. onion powder 
1/2 c. Worcestershire sauce 
1/2 c. soy sauce 
2 tbsp. liquid smoke

Trim off excess fat. Semi freeze meat for easier slicing. Cut across grain into 1/8 inch strips. Place meat in shallow pan. Combine all ingredients and pour over meat slices. Let set overnight in the refrigerator. To cook: Lay out strips on microwave bacon rack. Cover with paper towel. Cook on high power for 2 1/2 minutes. Turn strips. Cook 1 1/2 minutes. Turn strips. Cook 1 1/2 minutes. Let stand 5 minutes before eating. Cooking time may vary with thickness of meat. Store in airtight container.
 

Source: http://www.nancys-kitchen.com