In a large saucepan over medium heat, melt the butter.

Add diced onions and cook until tender, about 3-4 minutes.

Add minced garlic and cook until fragrant, about 1 minute.

Stir in orzo and cook until lightly toasted, stirring constantly for 2-3 minutes.

Pour in chicken broth and bring to a boil.

Cover, reduce heat, and simmer for 10-15 minutes or until most of the broth is absorbed.

Remove from heat and stir in cheese until melted and creamy.