This was simply excellent, and sold me on making pot pies, as long as I use this sauce (only 3 Tbsp. butter). I used moist, tasty chicken and stock from Pressure Cooker Whole Chicken, and ham left over from Ham With Ginger Crust. The finely minced onion made up the bulk of the sauce (I used the medium shredder on my Verona Assistent food processor) to great success. The leeks were the perfect counterpoint to the chicken and ham. DH and I are agreed that we would like to have this again and again. Thank you for sharing. Made for The Wild Bunch of ZWT8 for its trip to Britain.