Steam the cod over water to which the lemon juice and white wine have been added, about 7 minutes or until it flakes. Peel and dice potatoes; simmer until tender. Put the cooled potatoes through a ricer.
Saute garlic and onion until translucent. Fold together potatoes, garlic, onion, eggs, red pepper, parsley, seasonings, and Worcestershire sauce. Gently flake and mix the cod into the potato mixture. Form into 2-ounce cakes. (If mixture is too wet, you can add fresh bread crumbs until cakes hold together.)
Preheat oven to 350 degrees. Heat the clarified butter in a saute pan. Add the cakes and fry until golden brown. Flip over, and put the saute pan into preheated oven for 5 minutes to finish. Remove from oven and serve cakes hot, topped with Fresh Tarragon Mayonnaise.
Fresh Tarragon Mayonnaise
Place egg yolks and next six ingredients in a blender; blend well. On fairly high speed, slowly drizzle oil into the egg mixture, until it forms an emulsified mayonnaise.