1. Slice the top and bottom of the pomelo with a paring knife. Set one of the flat sides on your work surface. From top to bottom, following the curve of the fruit, cut away peel and white pith. Trim off any remaining pith. Holding the pomelo over a bowl, cut along both sides of each segment, staying close to the membrane, to release; set aside.

2. Place the minced meat in a medium saucepan along with 3 tablespoons water. Cook over medium heat until cooked through. Remove from heat and let cool slightly. Stir in lime juice, fish sauce dip, and chile; let cool completely.

3. In a large bowl, combine onion, ginger, cilantro, and crab. Tear pomelo segments into small pieces and add to bowl. Add cooled meat and toss to combine.

4. Serve salad in lettuce cups garnished with carrots and cucumber.