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May I suggest using any recipe that looks good to you, and using steam to get a crispy crust? There are a couple of ways to get steam into your oven. Placing a pan of very hot water in the bottom of the oven, spraying the bread with water in the first few minutes, or both. It's in the first 5 minutes or so that steam makes for a crispy crust. A baking stone helps too. Professional bakers have ovens that can produce steam in the right quantities and at the right time. We home bakers have to improvise. I'm saying that it isn't recipes you need, but technique. They don't have special ingredients in Germany for bread that we don't have here. Flour, water, yeast, salt, maybe some fat, is a basic bread recipe. Use bread flour, too, not all purpose. That picture also looks like the roll has an egg wash on it.