In a skillet over medium heat, add olive oil, diced onion, and bell pepper.
Once they are cooked about to the point that they are done to your liking, add the garlic and seasonings.
In your crockpot add the canned tomatoes and tomato paste. Stir.
To the tomato mixture, add the mushrooms and olives.
To the crockpot add the onion and pepper mixture. Stir to combine.
Add the chicken thighs to the crockpot. You can push them down into the mixture. Place the lid on top and cook for 6 hours on low.
You can shred the meat or leave them whole.
Serve over pasta of choice and top with parmesan cheese.
