Heat the olive oil in a Dutch oven set over medium heat.
1 tablespoon olive oil
Add in the Italian sausage and use a wooden spoon to break it up into pieces.
1 pound ground Italian sausage
Cook until browned. Transfer to a plate lined with paper towel.
Add in the onion and salt to the same pot and sauté for a few minutes until softened.
1 onion, ½ teaspoon kosher salt
Add in the garlic and Italian seasoning and cook for another minute.
3 cloves garlic, 1 teaspoon Italian seasoning
Add back in the cooked Italian sausage, plus the crushed tomatoes and tortellini.
15 ounces crushed tomatoes, 16-20 ounces cheese tortellini
Pour in the chicken broth and stir.
5 cups low-sodium chicken broth
Bring the soup to a boil. Then, simmer on low for 15 minutes.
Stir in the spinach until wilted.
4 cups fresh spinach
Slowly stir in the heavy cream before serving.
½ cup heavy cream