Cantonese Lean Pork Congee

INGREDIENTS

• 1 cup long grain white rice
• 1/2 teaspoon salt
• 1 teaspoon vegetable oil
• 5 cups water
• 1/2 pound boneless pork loin roast
• 1 1/2 teaspoons oyster sauce
• 1 salted (hard-cooked) duck egg, chopped
• 1 hundred-year egg, minced
• 1 (1 inch) piece fresh ginger root, thinly sliced
• 1/2 cup chopped green onion
• ground black pepper to taste
• soy sauce to taste