Peel and wash the beans. Blanch the bean seeds in boiling water for about 5 minutes, remove. Then remove the white skin of the beans. Wash the meat, dab dry, season with pepper and wrap each bean with 2 slices of bacon.
Heat the oil in a frying pan, fry the meat on each side for about 2 minutes. Fry over medium heat for 8-10 minutes while turning. Wash the sage, pluck the leaves from the stalks and add 8 leaves to the pan 2 minutes before the end of the cooking time.
Cut the rest of the sage leaves very finely. Heat the pan and fry 2 slices of bacon until crispy, remove and drain on kitchen paper. Heat the fat in a pot. Sauté the flour in it. Add milk and cream while stirring, crumble cheese into it and dissolve while stirring further at medium heat.
Season to taste with salt, pepper, nutmeg and the remaining sage. Peel and finely chop the onion. Sauté in bacon fat, add beans and heat over low heat while turning for about 3 minutes. Remove meat and sage from the pan.
Halve the fillets and arrange on plates with beans and sauce. Garnish with sage and bacon. Baguette tastes good with it.