Cut the beef fillet into strips and sauté. Chop the sage and cut the Serrano ham into fine strips. Add both to the fillet and fry briefly. Then take everything out of the pan.
Pour the roast set with white wine, simmer briefly. Stir in the processed cheese. Then add the remaining ingredients as well as the crushed garlic cloves, add the meat with sage and serrano again and let it steep for about 10 minutes. Season to taste with salt and pepper.
This goes well with pasta (in which case possibly add a little more of the liquid ingredients so that there is more sauce), rosemary potatoes and a crisp, fresh garden salad.