Add 2 tablespoons water to a skillet. Heat to medium high and add the mushrooms and start sautéing. Turn down the heat. Natural moisture will release form the mushrooms as they sauté.
After about 3 minutes add the onion and bell pepper. Sauté for 10 more minutes.
Add the garlic, oregano and salt. Cook 2 minutes.
While the veggies are sautéing start the pizza sauce. You can also us your favorite 14 ounce jar of pizza sauce instead.
To a large saucepan add the tomato paste and water. Mix well and turn to medium high heat. When t comes to a boil turn the heat down to a simmer.
Add the remaining 8 ingredients. Cook for 5 minutes.
Add all the veggies from the skillet into the saucepan along with the tomato sauce. Heat through and cook to the thickness that you like. It may already be ready. Add the black olives and heat through.
Serve now or let cool and refrigerate until you are ready to serve.
Alternately: Instead of making the pizza sauce you can use a 14 ounce jar of your favorite pizza sauce and save a little time.