Peel and wash the potatoes and cook them in boiling salted water for about 20 minutes. Clean, wash and cut the beans into pieces. Peel and slice carrots. Peel shallots, halve them lengthwise and cut into half rings.
Melt the fat in a pot. Sauté shallots, beans and carrots in it. Add stock and bring to the boil. Wash thyme, pluck leaves from the stalks, chop coarsely and add to the vegetables. Cover and cook for about 15 minutes.
Wash the chicken filet, dab dry and season with salt and pepper. Heat oil in a coated pan. Fry the meat in it at medium heat for about 10 minutes while turning. Drain the potatoes.
Season vegetables with salt and pepper. Arrange the vegetables with the chicken filets on a plate. Garnish with lemon slices, parsley and thyme. Add boiled potatoes.