Wash the fish fillets with cold water, pat dry and drizzle with the lemon juice. Season with salt and pepper.
Wash the peppers, cut in half, core and cut into cubes. Cook in approx. 125 ml water for about 5 minutes. Then puree with a cutting stick or mixer. Season to taste with salt and pepper. Peel the onions, cut into rings and cook in the paprika sauce for about 10 minutes. Place the fish fillets next to each other on the paprika sauce and let simmer for 10 minutes over a low heat. Cut the chives into small rolls. Scatter over the fish fillets.