Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      pound         boneless beef sirloin steak -- cut into 1" cubes
   2      tablespoons   lemon juice
   2      tablespoons   red wine vinegar
   2      tablespoons   vegetable oil
     1/4  teaspoon      cumin ground
     1/4  teaspoon      garlic -- crushed
     1/4  teaspoon      red pepper -- crushed
     1/2                green red and yellow bell
                        -- cut into 4 -- pieces
   4      small         onions -- parboiled
                        salt and pepper to taste

Preparation:

Combine lemon juice, onion, vinegar, oil, cumin, garlic powder and red pepper in bowl. Add beef cubes, stirring to coat. Thread beef cubes and pepper pieces onto 4 skewers, adding 1 onion to each. Place kabobs on grill rack so surface of meat is 3 to 4" from heat. Grill over medium coals 12 to 15 minutes, turning occasionally, to desired doneness. Season with salt and pepper to taste.