Cut the filo sheets into squares, to fit 8 pockets of the muffin tin. Brush the squares of filo with the melted butter & line each pocket with 3 squares.
Whisk the cream, egg and egg yolk together and season.
Fill the filo pockets with sautéed onion, chopped asparagus stem, smoked haddock, parsley, and the egg and cream mixture and place an asparagus spear on top.
Bake at 180°C for 15 - 20 minutes, or until cooked.