Frank's Oriental Chicken Stir-Fry

Ingredients:

• 1½ large yellow onion, finely diced
• ½ leek (white part only; if not a normal size leek (3-5 cm diameter, 1½-2 inch), use the entire leek); slice in half lengthwise, then cut into thin rings.
• 2 large carrots, finely diced
• 1 large red bell pepper, diced
• 2-3 celery stalks, finely diced
• 12 prunes (not dry), diced
• 250 - 350 gr (½-¾ pound) boneless chicken breast; cubed
• 2-3 tablespoons minced garlic
• 1 tablespoon mustard seeds
• 1 tablespoon coriander seeds
• 1 tablespoon Worcestershire sauce
• 2-3 tablespoons curry powder
• 2 tablespoons fresh ginger root, very finely diced