Season your chicken thighs well with kosher salt and freshly ground black pepper.
Toss chopped bell peppers, sliced mushrooms, and minced garlic into your slow cooker base.
Nestle those seasoned chicken thighs right on top of the vegetables.
Pour in the crushed tomatoes and chicken broth.
Sprinkle dried oregano and red pepper flakes over the entire mixture.
Close the lid, ensure the sealing ring is secure. Cook on low for 6 to 8 hours or high for 3 to 4 hours. Let release naturally.
Serve hot over linguine, rice, or crusty bread.
Notes
Store leftovers in airtight containers up to 4 days in the fridge or freeze for up to 3 months. Reheat gently and enjoy over pasta, rice, or as a pizza topping.