What's for Dinner: Chicken Cacciatore

So, on Twitter, one of the people I follow, @Wombat5277, posted this past weekend that he made some slow-cooker chicken cacciatore. I'm always a sucker for slow-cooker recipes, so I was intrigued. His recipe seemed pretty easy:
Sauce
2 cans of diced tomatoes
5 garlic cloves
salt
pepper
1/2 cup white wine

Directions
Cut up an onion, layer it on the bottom of the slow cooker. Put ~2 lb. chicken into slow cooker over the onion, then pour the sauce over the chicken. Cook on low for 8 hours.

I built a little bit on his recipe, this is what I made:
Ingredients
Onion
Mushrooms
Garlic (to taste)
6 bone-in chicken thighs, skin removed
2 14 oz cans diced tomatoes
1/2 cup dry white wine
1/2 tsp oregano
1/2 tsp red pepper flakes
1 tsp Penzeys pasta sprinkle
salt (to taste)
pepper (to taste)
4 Tbsp tomato paste (I use concentrated tomato paste that comes from a tube)

Directions
Sautee chopped onion with mushrooms (I used 5 oz. of shitake mushrooms, chopped) and a few cloves of minced garlic in ~1 Tbsp of butter, until just brown. Transfer to bottom of crockpot. Layer chicken on top of mixture, put in a couple whole cloves of garlic (optional). In separate bowl, mix other ingredients, then pour mixture over the chicken. Cook on low for 8 hours, stirring occasionally. Serve over rice or pasta.

I was pretty pleased with how this turned out. Once Lent is over, this will probably be added to my stock recipes for weekends.