Slow Cooker Chicken Cacciatore

I have no idea where I found this recipe! When I printed it out the link didn't show up at the bottom of the page so now I have no clue despite trying to search again. This was simple, easy and flavorful! We served it with rice initially but there was enough leftover that I ended up eating it for lunch a couple days with the Trader Joe's cauliflower gnocchi...which I am obsessed with by the way!
(picture from Skinnytaste)

1 1/2 lbs boneless, skinless chicken breasts, cut into 3-inch pieces
1 medium red onion, thinly sliced
2 bell peppers, thinly sliced
1 (14.5 oz) can fire-roasted diced tomatoes
3 cloves garlic, minced
1 1/4 t crushed red pepper
1 c chicken broth
1/4 c chopped fresh parsley

Lightly season chicken with salt and pepper and Place in a 5-7 qt slow cooker.
Top with onion, bell peppers, tomatoes, garlic, red pepper and broth.
Cover and cook on LOW 8 hours.
Sprinkle with parsley.