With the surge in new upscale burger restaurants I'm wondering if they have have any secret ingedients or techniques they use in creating their burgers? I'm going to a new burger joint today in CT, Plan B that everyone is raving about. We've also had several Five Guys, Shake Shack, Burgers Shakes & Fries open up within the last couple of years. Other than buying fresh (not frozen) choice or higher graded chucks of beef do they add anything to their burgers. I'm thinking MSG or onion/garlic powder etc. Do they salt & pepper intenally or just on the surface? Then rest before cooking? Any special grilling techniques?