Wash the fillet, dab dry and season with salt and pepper. Fry well all around in hot oil and fry at medium heat for about 20 minutes. Turn several times in between. Clean and wash the beans and cook in boiling salted water for 10 minutes. Crumble toast finely.
Peel garlic and chop finely. Pluck the thyme leaves from the stalks. Remove the meat from the pan and wrap in aluminium foil. Roast bread, garlic, thyme and lemon peel in the frying fat. Season with salt and pepper. Wash, clean and halve the tomatoes. Drain the beans. Melt the fat, toss the beans and tomatoes in it. Remove meat from the foil and cut into slices.
Wash, clean and halve the tomatoes. Drain the beans. Melt the fat, toss the beans and tomatoes in it. Remove meat from the foil and cut into slices. Arrange the bean vegetables on a plate and sprinkle with the breadcrumbs. Potato gratin tastes good with it