Place the ground beef, onion, bell peppers, garlic, diced tomatoes, tomato sauce and crushed pineapple in a slow cooker and stir well, breaking up the ground beef as much as possible. Add chili powder, paprika, cumin, cayenne, salt and pepper and mix well.
Cover and cook on low for 8 hours. Once done, stir well before serving.
Notes
For added flavor, brown the ground meat before adding to the slow cooker.
Recipe by Kiss by Brooke at https://www.kissbybrooke.com/2014/12/04/savory-beef-chili-from-the-paleo-kitchen-cookbook/