1. To prepare dressing, combine all dressing ingredients in a small bowl; stir well.
2. To prepare filling, heat a large nonstick skillet over medium-high heat. Add oil to pan; swirl to coat. Add pork and ginger; cook 6 to 8 minutes or until pork is browned, stirring to crumble. Drain well; return to pan. Stir in 4 teaspoons dressing.
3. Spoon 2 tablespoons pork mixture, 2 tablespoons cucumber, 2 tablespoons carrot, 1 1/2 teaspoons cilantro, 1 1/2 teaspoons mint, about 1 teaspoon onions, and about 3/4 teaspoon peanuts into each lettuce leaf; drizzle each with 1/2 teaspoon dressing.