Make the aioli sauce first by stirring together all the ingredients in a bowl and marinating in the fridge until the cakes are ready.
Finely dice the red pepper and onion and shred the lion’s mane by pulling apart into little pieces or using a food processor. Also chop the spring onion and parsley.
Heat a large skillet over med-high and add the lion’s mane to dehydrate. After a couple minutes stir then put pressure on top of the mushrooms by pressing a similarly sized pan on top to help release moisture. Cook down for about 15 more minutes, stirring every so often and keeping the top pan in place for pressure. Remove to cool in a bowl.
In the same skillet, heat 2 tablespoon olive oil and cook down the red pepper and onion for about 5 minutes, stirring occasionally. Remove to the bowl with the lion's mane.
Whisk the eggs together in a separate mixing bowl. Stir in the worcestershire sauce, lemon juice and mayo.
Add the egg mixture to the lion's mane bowl then stir in the panko crumbs, chopped spring onion, parsley, old bay, salt, and pepper. After the filling is well combined, seal with saran wrap and freeze for 30-60 minutes.
Line a couple baking pans with parchment paper then remove the filling from the freezer. Scoop 1 ounce at a time and form 24 round cakes, spreading out on the pans. Wrap the pans tightly with saran wrap and freeze until solid, about 6-12 more hours.
Once completely frozen create the breading station by beating the eggs in a shallow bowl then whisking in the all purpose flour. Spread the panko crumbs on a separate plate. Using tongs, dip the cakes into the egg mixture first before completely coating with the panko crumbs.
Heat ¼ cup olive oil in a large pan on med-high and add the cakes in a single layer. Cook until browned and crispy (~3-4 min) then flip and repeat on the other side. Transfer to a paper towel-lined plate.
Serve warm with the aioli dipping sauce and optional lemon wedges for garnish.