1 boneless beef top sirloin steak, cut 1 inch thick (about 1 pound)
1 medium green or red bell pepper, cut into 1 inch pieces
1 medium yellow squash or zucchini, cut lengthwise in half, sliced 3/4 inch thick
1 packet (1 ounce) ranch salad dressing mix
2 tablespoons water
1 tablespoon vegetable oil

Trim fat from beef steak.
Cut steak into 1-1/4 inch pieces.
Alternately thread equal amounts of beef and vegetables onto each of four 12 inch metal skewers.
Combine dressing mix, water and oil in small bowl; mix well.
Brush dressing mixture onto all sides of kabobs. 
Grill, uncovered, about 8 to 11 minutes for medium-rare to medium doneness, turning occasionally.
Brush kabobs with any remaining dressing mixture during last 5 minutes of grilling.

Fast, Easy and Flavorful Beef Recipe