Heat oven to 350 degrees. Spray a baking pan with nonstick cooking spray.
Place the pork loin roast in the pan.Top the pork with the onion slices.
In a small bowl, combine the tomato paste, Italian seasoning, and 1 cup of water. Stir to combine and pour over the pork and onions in the pan. Make sure to coat the roast.
Make a foil tent over the pork loin to seal in the heat. Bake at 350 degrees for 45 minutes. Remove the foil and cook for another 10 minutes. Check the temperature. The pork is done when an internal meat thermometer reaches 145 degrees. This will vary from oven to oven.
Remove the pork from the pan and and allow it to rest for 5 minutes before slicing.
Prepare pasta as directed on package.
Prepare fresh veggies.
Serve Italian Pork Roast with sauce over pasta with a side of fresh veggies.