Heat olive oil in a large pot over medium heat.
Add garlic, mushrooms, onions, and green peppers and saute 2 minutes.
Add turkey sausage (casings removed), breaking it apart with a wooden spoon.
Saute, stirring occasionally, until sausage is cooked through.
Add diced tomatoes, chicken broth, pizza sauce, and dried oregano.
Cook, stirring occasionally, until soup is heated through.
Prepare garlic bread according to package instructions.
Cut into 1 inch croutons and serve together.