Place the pasta, chicken stock, garlic, salt and pepper (to taste) into the pot of the pressure cooker.
Place the lid on the unit and turn to locked position.
Turn the steam release valve to sealing.
Press the manual button and adjust the time for 5 minutes.
Once the unit has finished cooking, carefully release the steam. (quick release)
If the steam begins to spray out of the steam release valve, close it and wait a few seconds.
After you have released the steam completely, remove the lid and stir the pasta.
Press the saute button and add the and cream cheese and whipping cream.
Cook for 2 minutes, stirring constantly.
Turn unit off.
Stir in the shredded cheese, broccoli and tomatoes.
Serve warm with a little of the shredded cheese and pinch of freshly chopped parsley for garnish.