
Heat a Dutch oven over medium heat; add butter.
Once the butter is melted, add the onions and garlic. Cook until the onions turn translucent.
Add the chopped celery and carrots, and cook for 6-7 minutes.
Add salt, pepper, thyme, and cayenne pepper. Saute for a minute. Stir in the chicken broth, deglaze the pot, and bring it to a boil.
Add the pasta and cook on low heat for 12-14 minutes until the stelline pasta is cooked perfectly.
Add chopped spinach and cook for a minute.
Top with parsley to garnish and serve with lemon slices on the side to enjoy.