Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      pound         boneless beef top sirloin steak -- cut 1 inch thick
   2      tablespoons   olive oil
   2      large         baking potatoes -- cut lengthwise into
                        quarters
   4      slices        red onion -- cut 1/2 inch thick
                        slices
                        ***SAUCE***
     2/3  cup           prepared steak sauce
   1      tablespoon    garlic -- crushed

Preparation:

In 2-cup glass measuring cup, combine sauce ingredients; cover and microwave on HIGH 2 minutes or until hot and bubbly, stirring halfway. Remove 3 tablespoons; brush onto both sides of beef steak. Reserve remaining sauce. Brush oil onto cut sides of potatoes and onion. Place steak and vegetables on grill over medium ash-covered coals. Grill uncovered 16 to 20 minutes until steak is medium rare to medium doneness and vegetables are tender, turning steak and vegetables occasionally. Brush vegetables with some of reserved sauce during last 5 minutes of grilling. Trim fat from steak. Carve steak crosswise into slices; serve with vegetables. Pass remaining sauce.