Rustic Italian Tortellini Soup

Ingredients

• 3/4 pound Italian turkey sausage links, casings removed
• 1 medium onion, chopped
• 6 garlic cloves, minced
• 2 cans (14-1/2 ounces each) reduced-sodium chicken broth
• 1-3/4 cups water
• 1 can (14-1/2 ounces) diced tomatoes, undrained
• 1 package (9 ounces) refrigerated cheese tortellini
• 1 package (6 ounces) fresh baby spinach, coarsely chopped
• 2-1/4 teaspoons minced fresh basil or 3/4 teaspoon dried basil
• 1/4 teaspoon pepper
• Dash crushed red pepper flakes
• Shredded Parmesan cheese, optional