I decided to use the crockpot so the ingredients really had time to mix and soften before being pureed, and because it's just so darn simple! You could also bake the chicken on a lightly greased baking sheet at about 375 degrees for approximately 20 minutes per pound. Another method is to poach it by placing diced chicken in a saucepan with enough water to cover it completely, bring to a boil, then simmer for 15-20 minutes until cooked through and no longer pink.
4. Can freeze the leftover puree for up to 3 months.