For the pike-perch fillet on sweet potato puree, let the pike-perch fillets thaw and cut into 4 equal pieces. Peel the sweet potatoes and boil until soft.
Then mash the potatoes and mix with milk and butter. Season with salt and pepper. The pike perch I have not seasoned, because he already himself I think has a perfect taste.
This now sear on both sides and arrange on the puree.