Lemongrass Pork Burgers

Process 2 shallots, the lemongrass, and ginger in a food processor until finely ground. Transfer shallot mixture to a medium bowl. Using your hands, gently combine shallot mixture, the pork, salt, and pepper (do not overwork meat). Shape into 6 patties (3 to 4 inches in diameter). Refrigerate, covered, until cold, about 1 hour (or overnight).

Preheat grill to medium-high (if using a charcoal grill, coals are ready when you can hold your hand 5 inches above grill for just 3 to 4 seconds). Brush grill and burgers with oil. Grill burgers, flipping once, until cooked through, about 5 minutes per side.

Make salad: Stir together remaining shallot, the lime juice, fish sauce, and chiles in a small bowl. Toss together shredded lettuce, the cilantro, and mint in a medium bowl. Add dressing; toss.

Place each burger on a lettuce cup. Top with salad, dividing evenly. Serve with cucumber wedges, if desired.