If you don't care for mushrooms, look the other way. Otherwise, you just may enjoy having what I had for lunch today. Quick, easy, and relatively healthy.
Basically, I just heated some olive oil in a skillet, placed in two portebello mushroom sliders and cooked "stem-side" down (I did remove the stem first). After a couple of minutes, I flipped them over and added a sprinkle of mozzarella cheese to both of the 'shrooms while the other side cooked. As soon as the cheese was melted (2-3 minutes), I removed them from the pan. Before eating, I topped both of the sliders with homemade salsa. Very easy. Very tasty.
If you try this, let me know what you think!