Tortilieni Soup (NYT)

Ingredients

• 2 tablespoons extra-virgin olive oil
• 1 medium yellow onion, chopped (1 1/2 cups)
• 1 large carrot, diced (1 cup)
• 2 celery ribs, diced (1 cup)
• 4 large garlic cloves, minced (2 tablespoons)
• 2 teaspoons chopped fresh rosemary or 1 teaspoon dried rosemary
• 1 teaspoon dried oregano
• 1/8 teaspoon crushed red pepper, plus more to taste
• Kosher salt (such as Diamond Crystal) and black pepper
• 2 tablespoons tomato paste
• 1 (14-ounce) can diced tomatoes
• 4 cups (1 quart) vegetable broth
• 1 (8- to 9-ounce) package refrigerated or frozen cheese tortellini 
• 1/4 cup heavy cream
• 4 cups baby spinach (about 3 ounces)
• 1 teaspoon red wine vinegar or balsamic vinegar

• Chopped fresh basil or parsley, for serving
• Grated Parmesan, for serving

Instructions

1. In a large pot or Dutch oven, heat the olive oil over medium heat. Add the onion, carrots and celery and cook, stirring occasionally, until the vegetables are tender-crisp, 8 to 10 minutes. Add the garlic, rosemary, oregano, crushed red pepper, 1 teaspoon salt (or 1 1/2 teaspoons if you’re using low-sodium broth) and 1/2 teaspoon black pepper; cook until the garlic is fragrant, 1 minute.
2. Add the tomato paste and cook, stirring often, until it begins to form brown bits on the bottom of the pot, 2 to 3 minutes. Add the diced tomatoes (and their juices) and broth, scraping up the bits on the bottom of the pan, and bring to a boil over medium-high heat. Lower the heat and simmer, partially covered, until the vegetables are tender, 10 to 15 minutes.
3. Add the tortellini, return to a simmer, and cook until pasta is tender, 2 to 3 minutes. (If using frozen, it might take an extra minute.) Add the heavy cream and spinach and cook for 1 minute, stirring often until the spinach is wilted. Off the heat, add the vinegar. Season with more salt and pepper, if needed.
4. Serve hot, topped with basil, Parmesan, and more black or crushed red pepper, if desired. Soup will keep for up to 5 days in the refrigerator or 3 months in the freezer (see Tip). The tortellini will continue to absorb liquid as the soup sits, so you may need to add a splash of broth when reheating.