Welcome to the most exotic, the most divine, the most unorthodox of sandwich creations. The champignon.
For the more adventurous of you, a variation of this recipe involves adding an extra 5 minutes of prep time to allow the champignons to reach their full, fungal potential.
For those who dare not tread, a more conservative approach involves omitting the extra prep time, sacrificing the full champignon experience but still delivering a satisfactory, if unsatisfying, sandwich.