Season the chicken pieces with the garlic and herb seasoning.
Heat olive oil in a large 12-inch non-stick skillet or Dutch oven over medium-high heat.
Add the chicken and cook, stirring occasionally, until golden brown on the outside and mostly cooked through, about 5–7 minutes.
Add the minced garlic and dried minced onion flakes to the pan and cook, stirring, for about 30 seconds until fragrant.
Pour in the chicken broth and add the orzo. Bring to a gentle simmer, then reduce the heat to medium-low.
Simmer uncovered for 15–18 minutes, stirring occasionally, until the orzo is tender and most of the liquid is absorbed.
Stir in the chopped parsley and grated Parmesan until combined and creamy. Adjust seasoning if needed, then serve immediately.