Wash, clean and halve the sugar snap peas. Put deep-frozen peas and sugar snap peas in plenty of boiling salted water and cook for about 1 minute. Put them on a sieve, rinse under cold water and drain.
Wash the mint, dab dry and cut into fine strips. Mix mint, mangetout and peas. Clean and wash romaine lettuce, pluck larger leaves a little smaller. Wash 2 lemons thoroughly, finely grate the peel or peel in fine strips.
Squeeze 1 lemon. Whip the cream lightly. Heat olive oil, lemon juice and zest in a saucepan. Carefully stir in the cream, remove from heat and season with salt, pepper and sugar. Arrange romaine lettuce and vegetable mixture on 4 plates.
Wash the remaining lemon and pike-perch fillets and dab dry. Salt the pike-perch fillets, overlap the fillets lengthwise and place two half lemon slices between them. Cut the fillets in half and wrap one slice of bacon around each.
Heat the oil in a frying pan and fry the fillets for about 4 minutes, turning them until golden brown. Spread lemon-cream dressing over the salad and arrange the warm pike-perch fillets on top. Serve garnished with lemon.