Sauce Soubise, Keller-Style

I recently came across a French Laundry course item from the 11 Nov 2018 menu.  That menu had an offering of Sauteed Sea Trout, Vidalia Onion Potato Relish, potato puree and ‘Sauce Soubise’.   It inspired me to consider making Chef Keller’s Sauce Soubise to pair with roasted arctic char.   But where to find the sauce […]