Melt the margarine in a large Dutch oven over medium-high heat. Add onion and next 4 ingredients (onion through garlic), and sauté 5 minutes. Add turkey, 1 1/2 cups beans, broth, and next 6 ingredients (broth through black pepper), and bring to a boil. Cover, reduce heat, and simmer 15 minutes.
Mash remaining beans. Add mashed beans and milk to the turkey mixture. Simmer, uncovered, 20 minutes or until mixture is thick, stirring frequently. Stir in chopped cilantro.