2 pounds of beef sirloin steak cut into 1 1/2 inch cubes
1/4 soy sauce
2 tbsp light brown sugar
2 tbsp white vinegar
1/2 tsp garlic powder
1/2 tsp onion powder
1/2 tsp salt
1/2 tsp pepper
juice of one lemon
green and red peppers cut into 2 inch pieces
onion cut into 2 inch pieces
zucchini cut into rounds
squash cut into rounds
skewers (soak in water for about 1 hour)
Place the beef sirloin steak cubes in a plastic resealable bag. In a bowl mix together soy sauce, brown sugar, vinegar, onion and garlic powder, salt and pepper and lemon juice. Pour into the bag, make sure to cover all of the meat with the marinade. Let marinade overnight or a minimum of 2 hours before grilling.
Cook the vegetables for about 6 minutes total. Turning them a couple of times on each side.
Tip: Soaking the skewers in water will prevent them from burning during grilling.