In this video, Chef John shows you the not-so-labor-intensive way to make homemade demi-glace. A delicious blend of mirepoix, tomato paste, and veal bones is roasted down and reduced to create a concentrated, flavorful, gelatinous sauce. The perfect complement for seared meats. Get the recipe for Chef John's Demi-Glace. And he'll show you how to store and use the sauce later on!