Ingredients:
1 lb top round steak; cut into 1 inch chunks
1 medium sweet onion, such as Vidalia, quartered
3 tablespoons soy sauce
1 tablespoon orange or apple juice
1 tablespoon salad or olive oil
1 tablespoon chili sauce
1/4 tsp. ground ginger
1 medium zucchini
1 medium yellow squash
1 red or green pepper
1/2 lb. medium mushrooms
1/2 lb. cherry tomatoes

In a medium sized bowl, mix the first 7 ingredients.
Cover mixture and refrigerate at least 2 hours, stirring occasionally. Prepare the grill, or preheat gas grill. Cut zucchini and yellow squash into 1 inch chunks. Cut the pepper into 1 inch pieces. On long skewers, alternately thread zucchini, yellow squash, peppers, tomatoes and mushrooms, beef and onions. (It's easy to leave off one of the ingredients if someone dislikes it) Reserve the  marinade for later.