Roast à la Zadik (Roast Beef with Carrots, Onions and Chestnuts)

I was thrilled that this recipe won the survey! This is in fact the first recipe I ever developed, before I knew what developing a recipe was. The method of cooking beef in a pressure cooker I learned from my mom, and the method of methodically submerging each slice of beef in the sauce I learned by watching my dad, who did it with the patience only he possesses. I developed this sauce over the years – it has gone through multiple variations and changes until it reached its current (and for me, final) composition. Ingredients 1-1½ kg. (2-3 pounds) beef shoulder roast 4 large carrots, peeled 2 large onions,…