In a large pot or Dutch oven, brown the Italian sausage over medium-high heat. Break it apart with a spoon as it cooks. Drain any excess grease.
Add the diced onion and minced garlic to the pot. Cook until the onion is softened, about 3-5 minutes.
Stir in the orzo pasta, chicken broth, and diced tomatoes. Bring the mixture to a boil, then reduce heat and simmer for 15-20 minutes, or until the orzo is cooked and the liquid is absorbed.
Remove from heat and stir in the grated Parmesan cheese and fresh basil. Season with salt and pepper to taste.
Serve immediately and enjoy!
Notes
For a spicier dish, use hot Italian sausage or add a pinch of red pepper flakes. You can also add other vegetables like bell peppers or zucchini.