Well, it's actually no such thing... but since two of the the 5 ingredients in this toasty, melty sandwich are of Spanish extraction, and the sound of "Spanish" and "sandwich" together made my ears happy, I decided to title this post as such.
Anyway, I made this in about 10 minutes over my lunch hour yesterday. I toasted everything in the oven because I'm a bit of a stickler when it comes to things being thoroughly toasted.
2 slices bread - I used some called Country Harvest because that was what I had. It would undoubtedly be delicious with something from the bakery, like a grain bread or even just a plain white Italian loaf.
3/4 cup grated Manchego cheese
1 1/2 slices of thinly sliced Serrano ham
fig jam or tapenade (onion jam works too, and red pepper jelly might even be a nice taste)
Turn broiler on in oven (500 degrees), and position rack to middle.
Butter one side of both pieces of bread. Put into oven until desired level of toastedness is reached. Remove.
Place Serrano ham on the toasted side of one piece of bread. Spread other toasted side piece with fig jam/tapenade/whatever, and then cover bread/spread with grated Manchego. Place back in oven until cheese has melted and ham has crisped slightly. Remove.
Place two sides of bread together - sandwich them, if you will, untoasted sides out. Place back under broiler to toast one side. Flip, then toast the other.
It's salty and sweet and pretty great for a fast meal. I ate it with some tomatoes dressed with a tiny bit of balsamic.
If you're not as interested in things being perfectly toasted on every side, then doing this like a traditional grilled cheese in a pan with butter is totally fine.