Banh mi-style sandwiches seem to be popping up everywhere lately. While I love this - because I love a good banh mi - I've got one big bone to pick. Most of the ones I've had are simply not good. There are a couple of key elements to the flavor profile of the banh mi that I feel many restaurants try to cheat out and cut corners on: Sriracho mayo, pickled daikon radish and carrots and fish sauce. The Sriracha-mayo combo is creamy, spicy and satisfying light-years beyond plain-old original mayo. The peppery radish and sweet carrot bring harmony to the spice of the mayo and savory of the meat in a way that pickled onions can't do. (You can swap red radishes for the daikon if your market doesn't have any, but please don't mess with the equation of tastes.) Fish sauce - that miracle elixir of Southeast Asian flavor - is the perfect finishing touch for that spicy, sour, savory, sweet and downright aromatic combo.
While the vegetables are marinating, prepare the turkey burgers. In a medium mixing bowl, combine the meat, Sriracha, cornstarch, fish sauce, garlic, basil and some salt and pepper. Divide the mixture into four equal portions and shape each portion into a burger.
Place a large skillet over medium heat with the sesame or vegetable oil and cook the burgers, flipping once, until cooked through, 4 to 5 minutes per side.
While the burgers are cooking, prepare the Sriracha mayo. In a small bowl, stir together the mayonnaise and Sriracha. Set aside.