Warm the unpeeled, washed potatoes in butter. Add crushed pepper and dried tarragon and cook with it. Sprinkle with a lot of sugar and let it caramelize slightly, toss. Season with salt and pepper to taste. Add parsley and continue tossing. Use oat flakes to bind them, they bind the fat and keep the aroma on the potatoes. Finally add the anchovies (chopped) and serve.