Zalmtaart

Today, March 14th, is Pi Day. I usually pay little attention to all these "Today-is-Fill-In-The-Blank-With-A-Food-Name-" days. Should not every day be pie day?!  So, initially I had not planned to write about this mathematical merriment, until I realized there was a Dutch connection. If the pie part did not catch my attention, the Dutch link surely did. Read on!
  

So, the first calculation of  π was carried out by the Greek mathematician Archimedes somewhere around 250 BC, who determined it to be 3 and a little bit after the comma, more accurately speaking "less than 3 1/7 but greater than 3 10/71". Over the next several centuries, other digit crunchers added more numbers to his initial calculation. 

The big breakthrough happened in 1600, when Ludolph van Ceulen calculated the first 35 digits of  π. This mathematician and fencing instructor, a German-born Dutchman, spent most of his life calculating the numerical value of the number pi, and even having it named after him (Ludolphian number), and writing papers and books about it. His amazing 35-digit approximation to pi is even engraved on his tombstone in Leiden. 

How interesting is that! Not having enough to do with calculating numbers, raising kids and teaching fencing, Van Ceulen also spent time posing problems and solutions to other mathematicians. One of these challenged peers was called Goudaen (meaning from the city of Gouda), of which you can read more here.  

So while I was trying to figure out who this Goudaen is, I was distracted by something else. It appears that the city of Gouda happens to house the oldest herberg, or inn, known in the provinces of South Holland. The hotel is called De Zalm (The Salmon). It was established in 1522 and back then was called De Ouden Salm. It had a gilded salmon on the top of its roof that blew off during a storm but that has been restored to its former glory since.

Never mind the salmon....imagine my surprise when I learned that Kralingseveer, by Rotterdam, housed the busiest and largest salmon auction during the 1800s and 19^th century. Apparently, our rivers were riddled with salmon during that time! Who knew?! After the industrialization, the rivers in the Netherlands became too polluted and the salmon pretty much disappeared, which was around 1890. The fish auction at the Kralingseveer was finally demolished in 1932 because there was no more salmon to auction off. Sad, sad, sad state of affairs.

So in honor of Pi day and as a tip of the hat to Ludolph van Ceulen I am celebrating with a warm, fishy salmon pie for lunch. It's different from Aaltje's recipe from 1857 which used pistachios and fresh salmon. Our salmon pie used to be an easy-to-make, safe standby for many long study nights during my college years, and was typical fare for many of us surviving on a budget during those years. Nowadays, it has practically disappeared from the student's culinary scene, much like the salmon from the rivers. Which is a shame really, it's worth a shot! Some people add pineapple and corn, or a few cups of frozen or fresh vegetables like broccoli or spinach, but I prefer this rather simple approach. 

Zalmtaart is also good cold for lunch, with a glass of cold milk. You could also try this cold zalmsalade, salmon salad. 

Zalmtaart

1 can of pink or red salmon (14.75 ounces)

1 package Boursin* cheese with garlic and fresh herbs (5.2 oz)

1 small shallot

1 tablespoon bread crumbs

3 tablespoons red and green pepper dice (or small can of Southwestern corn)

3 eggs

1 sheet puff pastry

Fresh parsley

Drain the salmon and break the meat into big pieces, picking out the skin and bones. Beat eggs with half of the cheese. Chop the shallot and fold into the eggs. Roll the thawed puff pastry out in 9 inch pie form, poke holes in pastry with a fork, and cover with 1 tablespoon of breadcrumbs or panko. Distribute the salmon chunks over the dough, and pour eggs on top. Break the rest of the cheese over the egg. Lastly sprinkle the bell peppers on top, or the drained corn if you're using it.

Heat the oven to 400F and bake the salmon pie in 20 minutes until done (the egg will be solid). You may finish it under the broiler to add some color to the top. Sprinkle with freshly chopped parsley just before serving. 

Makes 8 slices. 

* Don't care for salmon? Try tuna instead. If you don't have Boursin or cannot find it in your store, try a different soft and herby kind of cheese.