Heat olive oil in a large skillet over medium heat.
Add diced chicken breast and season with salt and pepper.
Cook the chicken until browned and cooked through, about 5-7 minutes.
Add minced garlic and sauté for 1-2 minutes until fragrant.
Pour in the chicken broth and bring to a simmer.
Stir in the orzo and cook for about 8-10 minutes until al dente.
Reduce heat and stir in heavy cream, lemon juice, and zest.
Add grated Parmesan cheese and stir until melted and creamy.
Taste and adjust seasoning if necessary with salt and pepper.
Remove from heat and garnish with fresh parsley before serving.