I have made this sandwich twice now -- the first time, because I was trying to use up avocado, and the second time (today) because it was so tasty the first time around! Try it!
Avocado Yum Sandwich
First, toast your bread lightly. I like to do this on all my toasty sandwiches for that extra crisp factor, and for stability when applying other ingredients.
I think this sandwich would also be excellent with the addition of bacon and/or butter, but it is fantastic as-is. I even told A. that somehow, with burning the bread a bit, the sharpness of the cheese, plus the sweet jam, it almost tasted like bacon, but he thought I was crazy. Well, he doesn't like avocado so he didn't try it. But you should!
(By the way, between sharp and mild cheddar, I think sharp wins. And make sure your avocado is nice and soft, too.) If anyone makes this, let me know!