Cut the peppers and onion into medium-sized pieces and fry them in olive oil over medium heat for about 10 minutes. They shouldn`t be brown and still have some bite. Add the chopped chervil and season with salt.
Have the butcher cut the beef heart into 1 cm thick slices and sprinkle with salt and pepper. Then fry in hot clarified butter on both sides for about 2 minutes. Then let it steep for another 2 minutes. The meat slices should still have a pink core.
Baguette, mashed potatoes or fried potatoes are enough as a side dish.