Meanwhile preheat a large skillet over medium-high heat. Add oil to hot pan with beef or lamb. Season the meat with salt and pepper. Brown and break up meat for 3 or 4 minutes. If you are using lamb and the pan is fatty, spoon away some of the drippings. Add chopped carrot and onion to the meat. Cook veggies with meat 5 minutes, stirring frequently. In a second small skillet over medium heat, cook butter and flour together for 2 minutes. Whisk in broth and Worcestershire sauce. Thicken gravy for 1 minute. Add gravy to meat and vegetables. Stir in peas.