Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add onion and garlic to pan; sauté 5 minutes. Add chiles; cook 2 minutes. Add broth; bring to a boil. Cover, reduce heat, and simmer 20 minutes or until chiles are tender. Cool slightly. Place half of chile mixture in a blender. Remove center piece of blender lid (to allow steam to escape); secure blender lid on blender. Place a clean towel over opening in blender lid (to avoid spills). Blend until smooth. Pour into a medium bowl. Repeat procedure with remaining chile mixture.
Heat 1 1/2 teaspoons oil in a Dutch oven over medium-high heat. Add beef; cook 7 minutes or until browned. Remove from pan. Heat remaining 1 1/2 teaspoons oil in pan. Add pork; cook 7 minutes or until browned. Add chile mixture and beef to pan. Stir in tomato puree and remaining ingredients except beans; bring to a boil. Partially cover, reduce heat, and simmer 1 hour or until tender, stirring occasionally. Stir in beans; cook 15 minutes.
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