Hand shred Lion's Mane Mushroom into small pieces resembling texture of flakey crab.
In large bowl, combine egg, mayonnaise, onion, Worcestershire sauce, old bay seasoning, Dijon mustard, parsley (finely chopped), salt and pepper. Mix until fully incorporated.
Mix in Lion's Mane Mushroom until fully incorporated.
Mix in Panko breadcrumbs until fully incorporated.
Form mixture into 3-4 equal size round flat patties (about ½ to ¾ inch thick).
Heat oil in sauté pan on medium/high heat.
Cook patties for approximately 2-3 minutes per side. Should be golden brown and cooked throughout.
Add optional garnish, squeeze of lemon and enjoy!
Notes
Leftovers and Storage: Transfer to airtight container or dish. Refrigerate for up to 48 hours. Can reheat and serve.
Vegan/Vegetarian Substitutions or Omission: You can use vegan mayonnaise and flax egg in place of regular mayonnaise and egg in this recipe.