Get a nice sized catfish (Wels in German) filet from your
fish market, figure 150 - 200 grams fish per person. Wash and
pat dry. Now make a dipping sauce out of sour cream, chopped
green onions, Dijon mustard, a pinch of salt, and enough milk
to make it not-too-think-not-too-thin. For breading grind up
a bunch of pecan nuts (walnuts will do, but pecans are better).
Now make the oven hot enough - 350 F / 180 C will do nicely - dip the
catfish in the batter, then in the breading and lay in a pan.
Cook for 12-15 minutes until the fish is done. Catfish isn't
as fragile as some fish are.