Boil water in a large pot.
Cook spaghetti until al dente.
Drain pasta and set aside.
Heat olive oil in skillet.
Sauté onion until translucent.
Add garlic and cook briefly.
Stir in shredded chicken.
Add cream of chicken soup.
Mix in diced tomatoes.
Pour in chicken broth.
Stir until combined.
Add paprika, salt, pepper.
Simmer sauce for 8 minutes.
Stir in cooked spaghetti.
Toss until well coated.
Transfer mixture to baking dish.
Sprinkle with Monterey Jack cheese.
Bake at 375°F for 20 minutes.
Remove when cheese is melted.
Garnish with parsley before serving.