Mix together ½ cup of salad dressing, 2 teaspoon Worcestershire sauce and 1 teaspoon dried oregano, and set half of it aside for the pasta topping.
Cook pasta according to package instructions (omit added salt)
Cut the steak into 1-inch pieces, mix it with the other half of the marinade, and marinate it for 8 hours to overnight in the fridge.
Soak some 10-inch skewers in water for about 15 minutes so they won't scorch while you cut up the zucchini and bell pepper.
Thread the marinated steak cubes, zucchini and bell pepper onto the skewers.
Fire up the grill and cook to desired doneness.
Pour the reserved half of the marinade over the cooked pasta, and place cooked beef skewers on top.