Needed:
Big mushrooms, preferably portabella mushrooms.
Feta cheese
Spinach
Sautee the spinach in a little olive oil
Warm up the feta cheese
Mix the spinach with the feta (about 1 past feta to 4 parts spinach)
Tape the stems out of the mushrooms and stuff them with the spinach and feta mix.
Cook in the oven for about 19 minutes at 350 degrees.