1 Simmer the asparagus pieces in boiling, salted water for about 6-8 minutes. Drain, retaining the cooking water.
2 Wash and trim the mangetout and cook in boiling, salted water for about 4 minutes. Drain, refresh in cold water and drain thoroughly.
3 Cut the salmon into approximately 2 cm strips. Rinse the lemon in hot water, halve and slice one half. Squeeze the other half. Put the lemon slices into a pan, add asparagus water to a depth of 2 cm and bring to the boil. Add the salmon, turn off the heat, cover and leave to stand for about 8 minutes.
4 Wash and trim the spring onions and cut into rings at an angle. Shell and slice the eggs.
5 Wash the salad leaves, shake dry and break into smaller pieces. Make a bed of salad leaves on 4 plates. Mix the lemon juice with salt and pepper and stir in 2 tbsp of asparagus water and oil.
6 Arrange the other ingredients on top of the salad leaves, drizzling over the dressing.