This can be made immediately, or freeze it for a busy day.
2 (15 oz) cans diced tomatoes
1 small can diced green chiles
3 tbsp (or one small packet) taco seasoning mix
1 tsp cumin
2 lbs boneless skinless chicken breasts or thighs
Combine all the ingredients in a freezer bag; seal and freeze.
To cook: Thaw overnight in refrigerator. Place contents of bag into crockpot. Cook on low for 4-6 hours/high for 3-4 hours, or until meat shreds easily. Shred chicken and serve with assorted toppings on a tortilla.