This is a fast and easy recipe for poached Karp.
Saute a large, chopped onion. Place either the whole Karp or slices in the pan and cover with fish stock or water.
Add a crushed clove of garlic, 1/2 cup white wine, 1 stalk of chopped celery, 1 sliced carrot, salt and pepper.
Simmer until tender.
Serve on a plate garnished with lemon wedges, lettuce and carrot slices. Serve with horse radish sauce.
You can also use this for Carp In Aspic.
Here are some good videos and below that links to many Polish food recipes.