zucchini sausage tortellini soup

Ingredients

• 1 tablespoon olive oil
• 1 1/2 pounds sweet italian sausage
• 1 large onion chopped
• 1 cup celery chopped
• 1 cup carrots, chopped
• 1 large red bell pepper chopped
• 2 tablespoons minced garlic
• 1 pinch crushed red pepper flakes
• 1/4 cup tomato paste
• 10 medium fresh roma tomatoes or 2 large ripe slicing tomatoes chopped
• 2 pounds zucchini cut in bite sized pieces
• 1 teaspoon kosher salt
• 1/2 teaspoon ground black pepper
• 2 quarts good chicken stock
• 1 cup grated parmesean cheese plus more for serving
• 2 tablespoons dried basil
• 1 tablespoon oregano, dried
• 3 tablespoons chopped parsley
• 1 teaspoon marjoram, dried
• 1 can cannellini beans
• 1 pound frozen tortellini