Chop onions and greens.
Beat eggs in bowl, 2-3 per person.
Saute onions in butter. When they are translucent, add green chop, then eggs. Add salt.
When the eggs are set on the bottom, put a dinner plate on top of the pan, flip it over, slide the fritatta back into the pan, and fry until both sides are done.
This is a rustic and forgiving dish. You can add thin slices of potatoes, peppers, tomatoes. You can fry bacon and then make the fritatta in the drippings. Top with any kind of cheese you like.
Cut into slices and serve with a green salad, a potato side dish, or toast.