Unique textures, unexpected spice levels ... Then serrano chiles might be the pickled topping your burgers need. "They're jalapeños' spicier, cooler older cousin," James Callery says.

You can get down with whatever toppings you want, but the basics have to be covered." Intrigued by Fieri's unique burger tips — including using a brioche bun and cooking with a bowl over my meat ...