Take thawed shrimp and and put into food processor or small food chopper. Process shrimp until they are chopped but still have some larger shrimp pieces. Do not puree or mince too small. Make sure you will still know you are eating shrimp.
Combine panko, shrimp, cilantro, chives, garlic, radish, celery, mayo, lemon juice, half of the old bay, salt & pepper in bowl. Mix well and combine.
Form into 4 burgers and sprinkle with other half of the Old Bay.
Grill burgers over medium heat. Grill each side 3-6 minutes a side or until the shrimp are all pink and opaque.
Serve burgers with baby spinach/lettuce and a pile of chilled salsa on top! A dash of cholula also tastes great.
Notes
You can also cook in a pan on medium heat. 3-6 minutes each side.