For the Ragù Bolognese: Heat butter and olive oil in large Dutch Oven over high heat, stirring occasionally, until butter has stopped foaming. Add lamb, pork, veal, and chicken livers, and cook, breaking up meat with wooden spoon, until no longer pink, 7-10 minutes. Remove from heat, transfer meat to strainer set in large bowl, allow to drain, then transfer drained liquid back to Dutch Oven. Add onions, carrots, celery, garlic, sage, and red pepper flakes, and set over medium heat. Cook, stirring frequently, until vegetables are softened, but not browned, about 10 minutes.
- 2 TBSPextra virgin olive oil
- 4 TBSPbutter
- 2/3 LB2/3 lbs ground lamb (or 85/15 ground beef)
- 2/3 LB2/3 lbs ground pork
- 2/3 LB2/3 lbs ground veal
- 4 OZchicken livers, finely chopped (optional)
- 1large onion, finely chopped (about 1 1/2 cups)
- 2large carrots, peeled, and cut into 1/4-inch dice (about 1 cup)
- 3large ribs celery, peeled, and cut into 1/4-inch dice (about 1 cup)
- 4 CLOVEgarlic, finely minced, or grated on a microplane grater
- 1/2 CUPfresh sage leaves, finely chopped (OR go with dried oregano…)
- 1 PINCHLarge pinch red pepper flakes (optional