Begin by heating olive oil in your large pot over medium-high heat. Remove the casings from the Italian sausage and crumble it into the pot. Cook it until it’s browned and no longer pink, which should take about 5-7 minutes. Stir frequently to break it apart and ensure even cooking!
Once your sausage is ready, toss in the finely chopped onion, garlic, diced carrot, and celery. Cook everything together for about 5 minutes until the vegetables are softened and fragrant. The base of your soup is officially taking shape!
Next, pour in the diced tomatoes and chicken broth. Add your dried herbs (basil, oregano, thyme) with a pinch of salt and black pepper for seasoning. Bring everything to a boil and prepare for the delicious aroma filling your kitchen!
Reduce the heat to low and allow the soup to simmer for about 10-15 minutes so the flavors meld together. Then, add your cheese tortellini to the pot. Cook according to the package instructions, which usually takes 5-7 minutes. The tortellini should turn tender and delightful!
Stir in the fresh spinach and cook for another 1-2 minutes. The spinach wilts quickly, adding vibrant color and even more nutrients to the dish.
Spoon the soup into bowls and garnish with grated Parmesan cheese or fresh basil leaves for added flavor. Serve warm and get ready for everyone to ask for seconds (or thirds)!