Over medium-high heat, melt butter in a saucepan. Add diced onion and minced garlic and cook, stirring constantly, for 2 minutes. Add orzo and cook for 1 minute, stirring constantly.
Add in chicken broth, squash, kosher salt, and black pepper. Bring to a boil.
Reduce heat to medium-low, cover, and simmer for 10-12 minutes. Stir occasionally.
Uncover and continue to cook/stir until most of the liquid has been absorbed. Once absorbed, stir in parmesan cheese and parsley; season with additional salt and pepper to taste.
Serve and enjoy!
Notes
Be sure to let the orzo absorb all of the chicken broth; this is necessary before adding in the cheese and parsley.
Season additionally to taste -- be sure to check for your salt preference before adding more, as the parmesan adds salt to the dish.