Steam the asparagus for 2 to 3 minutes, or until they are just tender.
Grease an oven safe dish with the butter and lay the asparagus lengthwise along the bottom of the dish, with the tips all pointing in the same direction.
Sprinkle the feta cheese over top of the asparagus, then the Parmesan and the oregano.
Sprinkle salt and pepper.
Bake on the middle shelf of the preheated oven for 5 to 10 minutes, or until all the cheese has melted and brown spots form on top.
Serve hot.
Recipe by Gluten free cooking at http://recipes.hellomagazine.com/glutenfree/20120719/baked-asparagus-with-feta-and-parmesan/