Place beef in a 5quart slow cooker.
Coat a 12inch nonstick skillet with cooking spray. Add onion, mushrooms and garlic; saut over mediumhigh heat for 5 minutes. Add onion mixture to slow cooker; add carrots.
Place half of beans in slow cooker; place remaining beans in a blender. Add 1/2 cup of broth to blender and puree; spoon mixture into slow cooker. Add remaining broth, tomatoes, oregano, dried thyme, salt and pepper to slow cooker.
Cover slow cooker and cook on high setting for 6 to 7 hours. Garnish with fresh thyme before serving. Yields about 1 1/4 cups per serving.
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