Zum Scharfen Rene Würstelstand
Rene's Würstelstand, located on Vienna's grand and high-trafficed Schwarzenbergplatz, specializes in spicy sausages: customers can ask proprietor René Kachlir to blanket their chosen piece of meat in a homemade chili sauce. The spice level of the default "curry" sauce is perfect for my taste, but there's room to ratchet up the heat for adventurous eaters.
Mr. Kachlir's sausages and sauces have proven to be so popular that they're now also sold under his own label at Billa, the local supermarket chain. Note that opening hours are a bit inconsistent and that Rene's is closed on the weekends.
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