I think it would be a sandwich I had in a gourmet bakery I went to two years ago. I invited a friend over and we had sandwiches together. The bread had been made with tasty spices and had oregano, and it was filled with a variety of tasty things: cheese, ham, pink sauce (ketchup and mayonnaise), egg and probably other things like tomato slices.
There was more to it that I can't remember due to how long ago it was, but it was indisputably one of the best sandwiches I ever had. I remember feeling in awe for the sandwich, because it was one of the tastiest things I'd eaten in the whole year.