1. Coat slow cooker bowl with nonstick cooking spray.
2. Season brisket with paprika, salt and pepper. Place in slow cooker. Scatter onion and garlic over brisket. Combine tomatoes, broth, vinegar, green pepper and chili powder. Pour over brisket.
3. Cover and cook on High for 6 hours or LOW for 9 hours.
4. Remove meat from slow cooker and cool slightly. Slice or shred and stir into sauce.
5. Remove brisket with a slotted spoon and serve on rolls, with pickles and coleslaw, if desired.