D's Super Yummy Sauce (for fish)

Last night D cooked our tea. He had a piece of cod and I had a piece of steelhead trout. He invented the yummiest sauce to serve on the fish (which he cooked very simply by seasoning and flouring and then cooking in a warm non stick pan).

He chopped up capers and dill pickle, and tarragon and folded this into some fat-free yogurt. He seasoned this with a bit of salt, black pepper and red pepper flakes. He slowly heated it (if it boils it will split, so don't let it boil) and added a bit of water. He ended up thickening it with a bit of cornstrach paste.

It was super yummy on the fish and also on the green beans.

Aren't you jealous?