Heat skillet medium heat. Add butter to skillet, heat till bubbly then add mushrooms and saute. While mushrooms are cooking, add eggs and milk/water to bowl (add salt & pepper to taste) and whip. Add eggs to mushrooms, frequently stirring, when almost done add Feta cheese. Cook lightly till cheese melts, being careful not to overcook the eggs.
Add eggs to plate and top with chopped cilantro.
Serve with small bowl of mixed fruit, or melon slices.