Peel and finely chop the shallots, put in a thick bottomed saucepan along with a tablespoonful of olive oil, and soften but not brown for five minutes or so. Add a glass of white wine and reduce. Take off the heat, add the single cream and crème fraîche, and season with salt and pepper. Grind up a few strands of saffron in a pestle and mortar and stir into the sauce
Picture , set to one side.