You might have stale sourdough; this has happened to many of us. So, how do you use it? This 5 minute creamy cauliflower soup with kale, leek and zucchini is perfect for rye sourdough bread croutons. Perfect way to use stale or dried out sourdough. #sourdough #cauliflower #cauliflowersoup| My Daily Sourdough Bread