Brown the ground beef (or turkey) until no longer pink, then add the onion and garlic and red pepper. Cook for a few minutes until softened, then drain the excess fat. (Rinse the beans in a colander and save the can for the grease!)
Add the salt and pepper, the chicken or beef broth, the drained beans and the tomatillo salsa. Turn the heat up to a good high simmer and cook, stirring, until thickened. Sprinkle the cilantro in and stir.
Serve with warmed flour or corn tortillas, sour cream, the grated cheese, and more salsa if you'd like.