Best Spinach Tortellini Soup Recipe - How To Make Spinach Tortellini Soup

Ingredients

• 2 tbsp. extra-virgin olive oil
• 1 large shallot, sliced
• 1 Parmesan rind
• Kosher salt
• 1 tbsp. tomato paste
• 1/4 tsp. crushed red pepper flakes
• 5 sprigs fresh thyme
• 5 sprigs fresh oregano
• Freshly ground black pepper
• 1 (28-oz.) can diced fire roasted tomatoes
• 3 tbsp. grated Parmesan, plus more for serving
• 2 qt. vegetable broth
• 20 oz. fresh or frozen cheese tortellini
• 4 c. (4 oz.) baby spinach
• 1/4 tsp. lemon zest, plus ½ tsp. lemon juice