Season the chicken pieces with the garlic and herb seasoning.
Heat the 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 4–6 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, stirring to combine. Bring to a gentle simmer.
Reduce heat to medium-low and simmer, uncovered, stirring occasionally, until the orzo is tender and most of the liquid is absorbed, about 15–18 minutes.
Stir in the chopped parsley and grated Parmesan until combined. Adjust seasoning if needed and serve immediately.