Croque Madame

This Croque Madame eschews a traditional béchamel sauce topping for the simple reason that, given the choice between taking time to cook delicious, creamy spinach and a boring, bland sauce, spinach wins every time. I’ve cheated by using crème fraîche, but you can leave it out and add a little mustard and nutmeg to the cheese as a final flourish before grilling.