To prepare on the stovetop: in your soup pot, saute onion and garlic in olive oil until fragrant. Stir in cubed chicken meat and saute until cooked.
Add diced tomatoes, pasta sauce, red pepper flakes, and chicken stock. Simmer for 15 minutes.
Stir in cream. Add pasta, stir, heat through, and serve topped with Parmesan cheese.
To Prepare in the Crock Pot: Place all of the ingredients except cream and pasta into your crock pot. Cook on low for 6 hours. Add uncooked pasta, turn the crock pot to high, and cook 30 minutes longer, or until pasta is cooked al dente. Stir in cream.