In the slow cooker combine chopped chicken thighs, capers, lemon juice, a chicken stock cube, garlic, dried thyme, black pepper and water. Stir well. Don't worry if the stock cube isn't completely broken up.
Cook on high for 3-4 hours or low for 6-8.
After the slow cook
Prepare cooked tagliatelle ahead of time.
Stir parmesan into the slow cooker mix. The sauce will start to thicken quickly. Add in the cooked tagliatelle and continue to stir.
Serve in bowls and sprinkle over freshly chopped parsley.