Cantonese Dinner

INGREDIENTS

• 2 pounds pork steak, cut into strips
• 2 tablespoons vegetable oil
• 1 onion, thinly sliced
• 1 (4.5 ounce) can mushrooms, drained
• 1 (8 ounce) can tomato sauce
• 3 tablespoons brown sugar
• 1 1/2 teaspoons distilled white vinegar
• 1 1/2 teaspoons salt
• 2 tablespoons Worcestershire sauce