Preheat oven to 375ºF. In a small saucepan, bring the BBQ sauce ingredients to a boil. Lower the heat and simmer until thickened, 20 minutes.
Meanwhile, in a bowl, combine the turkey, scallions, parsley, thyme, salt and pepper; form into 4 patties. Coat the patties in the flour, then the eggs, then the cornflakes. Spray a baking sheet with the cooking spray. Place the turkey patties on the sheet and spray the patties. Bake until crisp, 18-20 minutes.
Place the turkey patties on the rolls, doused with the sauce. Serve with the toppings of your choice.