In a large saucepan over medium heat, add the olive oil. Once hot, add the sliced chicken sausage and cook until browned, about 5-7 minutes. Use a spatula to break them apart as they cook.
Add the diced onion and minced garlic to the pan, stirring for 2-3 minutes until the onion is translucent.
Incorporate the broccoli florets and cook for another 2 minutes until they are vibrant green but still crisp.
Add the orzo pasta to the saucepan, mixing it well with the sausage and vegetables.
Gradually pour in the chicken broth while stirring. Bring to a gentle boil, then reduce the heat to low, cover, and let it simmer for about 10-12 minutes or until the orzo is cooked al dente and has absorbed most of the liquid.
Stir in the lemon zest, lemon juice, red pepper flakes (if using), and season with salt and pepper to taste. Mix well to combine all the flavors.
Remove from heat and stir in the grated Parmesan cheese until melted and creamy.
Serve hot, garnished with freshly chopped parsley for a pop of color.
Notes
Feel free to adjust the amount of red pepper flakes based on your heat preference.