Cook pasta according to the package. Drain well and set aside
Heat a large pan over medium/high heat
Add margarine and allow it to melt
Add garlic and cook for one minute, until fragrant
Dice onion. Add to pan and cook until slightly soft, about 3-4 minutes
Add ground chicken and break apart a bit. Sprinkle on the seasonings and mix to combine, while continuing to break apart
Add the broth and bring the mixture to a slight simmer. Completely cook the chicken
Once chicken is completely cooked, add the cream cheese and mix everything together as the cream cheese melts
Add the shredded cheese and mix everything together as the cheese melts
Bring the heat up for just a few minutes to reduce the sauce
Add in the pasta and toss to coat