Rich salted egg yolk zongzi with creamy, golden yolk center are a luxurious festival treat. A family Dragon Boat tradition with savory depth.
Soak glutinous rice in water for 4 hours, then drain thoroughly.
Soak dried shiitake mushrooms and dried shrimp in warm water for 1 hour; squeeze excess water from mushrooms and slice.
Mix pork belly slices with 2 tbsp soy sauce, 1 tbsp oyster sauce, and white pepper; marinate for 30 minutes.
Drizzle sesame oil over drained rice, then season rice with 1 tbsp soy sauce and 1 tbsp dark soy sauce, tossing until evenly coated.
Blanch bamboo leaves in hot water until pliable, then rinse and pat dry.
For each zongzi: Layer 3 bamboo leaves to form a cone, add 2 tbsp seasoned rice, some mushrooms, peanuts, shrimp, marinated pork, and press one salted egg yolk in the center; top with more rice.
Fold and wrap securely, tying tightly with cotton twine.
Boil all zongzi in a large pot of water (ensure full submersion), then simmer over medium-low heat for 2.5 to 3 hours; add hot water if needed.
After simmering, remove zongzi, drain, and rest for 10 minutes before unwrapping to serve.