Season the chicken tenderloins with the garlic and herb seasoning, then cut into bite-size pieces.
Heat the olive oil in a large 12-inch non-stick skillet or Dutch oven over medium-high heat.
Add the chicken pieces and cook, stirring occasionally, until golden brown on the outside and mostly cooked through, about 4–6 minutes.
Add the minced garlic and dried minced onion flakes to the skillet and cook, stirring, for about 30 seconds until fragrant.
Pour in the low-sodium chicken broth and add the orzo. Bring to a gentle simmer, then reduce heat to medium and cook uncovered, stirring occasionally, until the orzo is tender, about 15–18 minutes.
Stir in the chopped parsley and grated Parmesan until the cheese melts and the mixture is combined. Adjust seasoning if needed and serve immediately.