How to Make the Ultimate Umami-Bomb Vegetarian Demi-Glace
1 pound lean ground lamb
1 egg, lightly beaten
1/4 cup dry bread crumbs
2 tablespoons finely chopped mint
Salt and freshly ground pepper
1/2 cup extra-virgin olive oil
1 medium onion, finely chopped
1 garlic clove, finely chopped
1/2 cup dry white wine
1/2 cup beef broth
1 cup tomato puree
In a bowl, mix the lamb with the egg, bread crumbs and 1 tablespoon of the mint. Season with salt and pepper. Form the mixture into 1-inch balls.
Heat the olive oil in a very large skillet. Add the meatballs and fry over moderately high heat until browned all over, about 4 minutes. Transfer the meatballs to a plate.
Add the onion and garlic to the skillet and cook over moderate heat until softened, about 8 minutes. Add the wine and cook, stirring, until reduced by half, about 5 minutes. Transfer the mixture to a food processor. Add the remaining 1 tablespoon of mint and puree.
Return the onion puree to the skillet. Add the broth, tomato puree and meatballs and simmer over low heat until the meatballs are cooked through, about 10 minutes. Season with salt and pepper and serve.