1/4 cup cup mayonnaise
2 scallions, thinly sliced
1 large egg, lightly beaten
1 tablespoon Dijon mustard
2 teaspoons fresh lemon juice plus wedges for garnish
1 1/2 teaspoons Old Bay Seasoning
1/2 jalapeño, seeded, finely chopped
1 pound lump crabmeat, picked over
1 1/4 cups panko (Japanese breadcrumbs), divided
1 tablespoon thinly sliced chives
1/4 teaspoon kosher salt
1/8 teaspoon freshly ground black pepper
1 head Bibb lettuce
2 tablespoons vegetable oil