In a small bowl, whisk together peanut butter, chili sauce, ginger, soy sauce and lime juice. Set aside.
Heat a large skillet over medium heat. Add the avocado oil and the mushrooms, and cook, stirring occasionally until the mushrooms have softened. Sprinkle with garlic powder and stir to coat.
Add the pepper, cabbage, red onion, and carrot and saute until just softened. Remove from heat, and add the cilantro. Gently coat the mixture with half of the peanut sauce.
To serve, fill butterleaf lettuce leaves with a large spoonful of the mushroom mixture and sprinkle with peanuts. Dip in remaining peanut sauce, if desired.