To a 4 quart or larger crockpot add canned tomatoes, tomato paste, Worcestershire sauce, garlic, cumin and oregano. Stir until thoroughly blended then stir in the onion, green pepper, frozen lima beans, corn, and the chicken.
Cover and cook on LOW for 7 to 8 hours, or until chicken is tender. Remove chicken to a cutting board and using 2 forks, pull meat into shreds. Return chicken to crockpot.
To serve: ladle stew into soup bowls and sprinkle with bacon.