Crab Cakes with Creole Mustard Sauce

• 2 cups mayonnaise
• 2 egg yolks
• 2 tablespoons chopped fresh tarragon leaves
• 1 tablespoon minced yellow onion
• 2 teaspoons Worcestershire sauce
• 1 teaspoon hot pepper sauce
• 2 tablespoons dry mustard
• 1 teaspoon crab boil seasoning (recommended: Old Bay)
• 1 teaspoon salt
• 1 teaspoon ground black pepper
• 2 pounds lump crabmeat
• 2 cups panko bread crumbs
• Vegetable oil, for grilling
• Mixed spring greens, for serving
• Creole Mustard Sauce, recipe follows

Creole Mustard Sauce:

• 1 cup mayonnaise
• 1 jalapeno pepper
• 1 red bell pepper
• 3 tablespoons Dijon mustard
• 2 tablespoons chopped fresh chives