Zesty Grilled Kabobs

Ingredients

• 1 1/2 pounds boneless beef sirloin, cut into 1-inch cubes
• 2 cups fresh mushrooms, trimmed
• 1 medium green bell pepper, seeded and cut into 1-inch pieces
• 1 medium onion, quartered
• 1 medium zucchini, sliced into 1-inch rounds
• 1 cup mayonnaise
• 1 packet dry Italian salad dressing mix
• 2 tablespoons red wine vinegar
• 2 tablespoons water