Turn fresh shrimp in to burger-worthy patties after giving them a spin in a food processor and binding them together with burger bun bread crumbs.
Finely grind 2 burger buns in a food processor (1 1/2 cups crumbs) and transfer to a bowl. Pulse shrimp in processor, then toss with crumbs, mayonnaise, salt, and pepper. Form into 4 patties. Melt butter in a skillet and cook over medium, turning once, until cooked through, about 9 minutes. Serve on buns with lettuce and tartar sauce.