Chop mushrooms and pepper into thin slices.
Turn crock pot to high heat. Add chicken thighs, tomato sauce, sliced tomato, garlic, spices, and hot sauce to crock pot.
Add peppers and mushrooms to chicken mixture, mix thoroughly.
Let simmer on high for 2 hours.
Turn crock pot to low, stir ingredients. Allow to cook for another 3-5 hours.
Add 3 tbsp butter to your stew and stir together. Optional: ½ tsp xanthan gum for thickening.
Cook for another hour without the lid so the sauce can reduce.
Serve hot and enjoy. Or store it in the fridge and re-heat for meals later in the microwave.