Peel the shallots and, depending on the size, possibly halve them. Clean, wash, drain and cut lettuce into strips. Wash the chicken filet, dab dry and season with salt and pepper.
Heat the oil in a pan and fry the chicken fillets for about 10 minutes while turning. Boil up shallots, frozen peas, 100 ml water and a little salt in a pot. Cover and cook for 5-6 minutes.
For the duchess potatoes, boil 300 ml water and 1 teaspoon of salt. Add cold milk and stir in the puree flakes. After 1 minute stir again and season with nutmeg. Pour into a piping bag with a star-shaped spout and spray about 16 tuffs onto a baking tray lined with baking paper.
Bake in the preheated oven (electric cooker: 200°C/ gas: level 3) for approx. 8 minutes. Heat up the jam and spread on the chicken fillets. Drain vegetables and fold in lettuce. Foam butter in a pot.
Arrange chicken fillets, pea vegetables and duchess potatoes on plates. Serve garnished with parsley. Serve with butter extra.