Hand shred Lion’s Mane Mushroom into small pieces resembling texture of flakey crab.
In a small bowl, combine egg, mayo, onion, Worcestershire sauce, old bay seasoning, dijon mustard, parsley, salt, and pepper. Mix until fully incorporated.
Mix in Lion’s Mane Mushroom. Mix in panko breadcurmbs.
Form mixture into 3-4 equal size round flat patties.
Heat oil in pan on medium/high heat. Cook patties about 2-3 minutes per side. Should be golden brown and cooked throughout.
Add optional garnish, squeeze of lemon, or tartar sauce if you prefer.