Ingredients 1 (14 oz) loaf brioche bread, cubed into ¾” pieces Olive oil Kosher salt ¼ cup olive oil 1 lb mushrooms, sliced ¼” (use a mix of shiitake, portobello, cremini, etc.) 1 small onion, diced 2 celery stalks, thinly sliced 4 cloves garlic, minced 2 tbsp butter ¼ cup chopped mixed h…