Mexican Tinga

Jenn, I feel like you've been carrying this blog for a little while, and I thought that I might help out with this recipe.
I found this on allrecipes.com, but I changed it a little to fit our tastes. You can find the original recipe here. It's pretty simple, but I enjoyed it and will make it again. Here's my changes to it.

4 chicken breasts
1 (14oz) can diced tomatoes with green chilies.
1 onion, chopped
sour cream
shredded cheese
shredded lettuce
tostada shells (you can fry your own corn tortillas in oil until crispy, that's what I did)

Season chicken with salt and pepper and a little cumin. Puree tomatoes and add to chicken. Add onion and cook on low for 6 hours, high for 4. When chicken is cooked, shred and return to crock pot.

To serve, put chicken on tostada, top with sour cream and what ever else you want. Like I said, it's pretty simple, but it's different and good.