How to Make It
In a skillet, heat the canola oil. Add the onion and stir-fry over moderate heat until softened and golden, 5 minutes. Stir in the garlic and cook for 1 minute. Add the pork and cook, stirring occasionally and breaking up the meat, until browned, about 3 minutes. Stir in the honey, fish sauce and sesame oil and cook, stirring, until no traces of pink remain in the pork, about 2 minutes. Remove the skillet from the heat. Stir the lime zest and lime juice into the pork and season with salt and pepper.
Arrange the lettuce cups on a serving platter. Fill with the pork and garnish with scallions. Serve with lime wedges.