Heat the sunflower oil in a pan over medium heat. Sautee the mushrooms, white onion, pepper, and peanuts until they're as soft as you like them. I generally wait until the onion is translucent and then cook about 2 more minutes for good measure.
Add the sichaun and duck sauces. Simmer for 2-3 minutes, just so the sauces can incorporate into the other ingredients.
Once everything is combined, add the green onions. They're better with a fresh, uncooked flavor.
Separate the bibb lettuce leaves and use as bowls for spoonfuls of the mushroom mixture. Enjoy!