First, make broth my placing whole chicken in the slow cooker. Cover with water, add salt and pepper. Cook for 8 hours on low.
Approx 1 hour and a half before serving, saute vegetables and spices in one tablespoon olive oil in a large pot on medium heat for 5-10 minutes.
Stir occassionaly to avoid sticking.
Allow chicken to cool, take off bone.
Strain homemade broth from slow cooker.
Add strained broth, canned tomatoes, and shredded chicken to pot. (I prefer to use only the white meat)
Simmer for an hour on low heat, covered.
Salt and pepper to taste.