salmon passion fruit hollandaise

My play with Transglutaminase continues after an intensive week of catering. Here I've made a salmon ravioli filled with passion fruit hollandaise. When I used to work the line, the hollandaise was made before service and kept in a warm bath. This didn't make sense to me and I insisted on making it to order, which pissed everyone off. They backed down when I proved that a perfect sauce could be made in the time that it took them to get their pans hot.

My entry into the world of cooking was through the sweet side. The skills that I have learned from baking have eased my transition to the savory side of the kitchen. I look for the moments when the two worlds collide and the transition feels seamless.

One day, while making a lemon curd, it occurred to me that I was essentially making a sweetened hollandaise. Although the cooking methods and proportions varies slightly between the two, the chemistry is the same in forming these egg-emulsified sauces. They share the same trio of key ingredients: egg yolks, fat in the form of butter, and acid in the form of lemon juice.  When isolating these ingredients and considering possible alternatives, it becomes easy to imagine flavor variations on the classic hollandaise. Egg yolks are unique in their protein coagulation, but acid can be introduced in the form of any fruit juice that has a PH of 3.0 or lower so as not to over-dilute the egg yolk. Candidates that fall in this range are: grapefruit, lime, cranberries, gooseberries, wild grapes, verjus, raspberries, rhubarb, pomegranates, tamarind, and passion fruit. These are all flavors that I've used to make fruit curds, so why not hollandaise? To bring it back to the savory realm, even the butter can be replaced with solidifying fats such as: foie, bacon, duck fat, serrano fat. Can you see where I'm going? Does this excite you as much as it does me?

For this ravioli, the hollandaise posed a challenge because it needed to solidify in order to glue the thin sheets of salmon around it, then to revert to it's fluid sauce state when reheated. A traditional hollandaise was not stable enough to endure the freezing and cooking process without curdling. I fiddled with a few additives and techniques before hitting on the simple addition of a small amount of gelatin. This allowed the hollandaise to firm up sufficiently without the need to be frozen, which I suspect had destabilized the emulsification, and to remelt in the sous vide bath.

 

sous vide salmon ravioli filled with passion fruit hollandaise
crispy salmon skin
asparagus ramp puree
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