Scavenger mackerel sandwich

I am going to be in Sevilla this weekend, celebrating the wedding of two very dear friends. Since they asked me to illustrate their invitation and the little menu cards for the tables, I know what the menu will be. Takes such a load off my mind. Otherwise, I spend all the time at the church wondering if it´s going to be a fish or meat wedding. Idle thoughts, you´ll say, but it´s hard to be entertained by a wedding mass, at my time of life. I get to hear St.Paul´s epistle many times every year.
Not that I needed the privileged info this time. The groom is allergic to shellfish and strawberries, which rules out all that traditional part of the wedding feast.
And anyway, this post is about the sandwich we had yesterday for our dinner. There was also chicken consomé, because it´s been raining like hell all week, and I´ve been communing with my inner five-year-old and stepping in puddles, and rather fear I´ve caught a cold.
But the sandwich? It was excellent, and surprisingly so, since it started from really scavengy beginnings.
Pan de leche buns, which are rather sweet and soft, were spread with a mayonaise made better and pinker with lemon juice and chili paste. The remains of the mackerel escabeche, carefully de-boned, were laid on top. Black olives were then dotted around tastefully, and the whole thing covered with a crunchy lettuce leaf.
I loved it. All the tastes seemed to meld into a very harmonious whole, somehow, which I never thought they would. Just what I wanted for dinner.