Brochettes a la Camerounaise

Ingredients

• A few pounds of Beef

  cut into bite-sized pieces
  1 unit
• Onion

  sweet green pepper, tomatoes (optional); cut into bite-sized pieces
  1 unit
• oil
  1 unit
• vinegar (or cider vinegar)
  1 unit
• tomato

  chopped
  1 unit
• Onion

  finely chopped
  1 unit
• garlic

  minced
  1 unit
• fresh ginger

  minced
  1 unit
• cayenne pepper or red pepper
  1 unit
• salt
  1 unit