Preheat a frying pan or skillet over medium heat. Coat the pan with the butter, but do not let it brown or burn.
Mix the eggs and cream in a bowl. Pour the egg mixture into the pan, tipping the pan to make sure the egg mixture coats the entire bottom of the pan.
Add the feta cheese and spinach to one site of the omelet and sprinkle the herbs, salt, and pepper onto the other side. Cook until the eggs turn solid, then flip the herb side over onto the spinach/cheese side.
Continue cooking one or two more minutes, flipping carefully a couple of times.
Serve with 3 strips of bacon or 3 sausage patties.