In a large pot, heat the olive oil over medium heat. Add the halal Italian sausage and cook until browned, breaking it up with a spoon as it cooks, about 5-7 minutes.

Add the diced onion and minced garlic to the pot. Sauté until the onion is translucent, about 3-4 minutes.

Pour in the chicken broth and diced tomatoes, then stir in the oregano, basil, and red pepper flakes (if using). Bring the mixture to a boil.

Once boiling, add the tortellini and cook according to package instructions, usually about 3-5 minutes.

Stir in the chopped spinach and cook until wilted, about 1-2 minutes. Season with salt and pepper to taste.

Serve hot, topped with grated Parmesan cheese if desired.