I got this basic recipe (if you can call it that) from a friend, and then combined a few different ideas I found online to make them.
Generally, I am not a fan of mushrooms. I find them spongy when raw and slimy when cooked. However, everyone kept telling me that portabello mushrooms were different--with a "meaty" texture. So I thought I'd give them a try.
4 Portabello mushroom caps, with stems removed
minced garlic (optional)
sliced Asiago cheese
Preheat oven to 425. Rub both sides of mushroom caps with olive oil and place on a broiler pan. Sprinkle with Italian seasoning, and minced garlic (I didn't do the garlic this time). Place in preheated oven for 35 minutes.
Remove pan from oven. Pour Balsamic vinegar over each mushroom (into the cap). Top with Asiago cheese slices. Broil for 10 minutes.
I thought they turned out pretty well. Except for a few bites in the middle, I didn't mind the texture. TheBig Geek, however, ate only a few bites before declaring he didn't like the texture, but would enjoy the balsamic/asiago combination on something else like chicken. The Little Geek claimed she tried a bite and didn't like it, but I'm not so sure.
Obviously, I won't be making these for our family again unless both the Little and Big Geeks are out of town. However, I'd happily eat another Portabello mushroom at someone else's house or at a restaurant in the future.