For the Jalapeño Mayonnaise1½ cups mayonnaise2 Tbsp red onion, chopped1 tsp fresh cilantro, chopped½ tsp dry mustard1 Tbsp Jalapeño pepper, seeded and finely chopped
For the Crab Cakes½ cup Jalapeño mayonnaise, plus more for serving1 large egg, beaten1 tsp dry mustard¼ tsp red pepper flakes, crushed½ tsp kosher salt½ tsp freshly ground black pepper½ cup yellow corn kernels,