Mix together flour dill, salt, ground mustard, and cayenne pepper in one bowl. Whisk together egg and water in second bowl. Pulse almonds in a food processor or blender until it becomes the texture of cornmeal or grits. Add almonds to a third bowl.
Dip fish into the flour mixture, then egg wash, then into the almond crumbs. Place onto sheet pan and bake for 12 to 15 minutes until almonds are golden brown.
Serve with a fresh lemon wedge and enjoy!