Cook the lentils in boiling water for 8-10 minutes. Drain and leave to drain. Clean the cauliflower. Cut the florets from the stalk, possibly halve them and cook in boiling salted water for 4-6 minutes. Drain, rinse with cold water and drain. Peel and chop the onion. Clean the chilli, cut lengthwise, wash and remove the seeds. Cut the pods into small pieces
Whisk together the chilli, onion, mustard and vinegar. Season with salt, pepper and sugar. Beat the oil in a thin stream. Mix lentils and cauliflower with the vinaigrette. Season to taste and put aside. Wash the salmon, dab dry
Boil up the apple juice with lemon juice in a pan. Season with salt and pepper. Add the fillets and steam on medium heat for about 5 minutes on each side. Cut cress from the bed and mix into the salad. Arrange salmon with the salad. Garnish with lemon slices