While pasta is cooking, in a seperat pan, brown and crumble the meat mixture, then drain leaving 1 tbs of grease, and also taking out the meat and putting into a bowl until needed later.
In the leftover grease, saute the bell peppers and onion for 5 minutes.
Then add in the tomatoes, meat, and velveeta, and stir until melted.
Drain pasta, and mix the sauce and the pasta together -- serve and enjoy!