Add butter to your pot and heat to medium.
Add onion and Italian seasoning. Cook for 4-5 minutes, stirring occasionally, or until translucent and softened.
Stir in garlic and cook for 1-minute.
Add pasta, broccoli, water, milk, bouillon, and mustard to the pot. Stir.
Cook uncovered for 12-15 minutes, or until orzo is cooked through and most excess liquid has been absorbed. Stir occasionally to prevent orzo from sticking to the bottom. If the mixture starts to boil, reduce the heat to medium-low.
Turn off the heat. Stir in both cheeses and black pepper, until cheese is melted and smooth. Taste, and add salt as needed. Close the lid and let it rest for 5-minutes.
Serve with extra black pepper and shredded cheddar, if desired. Enjoy!
