In a medium saucepan, melt 2 tablespoons of butter over medium heat. Add minced garlic and sauté for about 1 minute until fragrant.
Add the rice to the saucepan and lightly toast it for about 2 minutes, stirring frequently.
Pour in 2 cups of chicken broth and bring to a boil. Once boiling, reduce heat to low, cover, and simmer for about 15 minutes, or until the rice is cooked and liquid is absorbed.
Stir in the grated Parmesan cheese and heavy cream. Season with salt and pepper to taste. Keep warm.
Cut the chicken breast into bite-sized pieces and season with salt and pepper.
In a large skillet, heat 3 tablespoons of olive oil over medium-high heat. Add the chicken pieces and cook until browned and cooked through, about 5-7 minutes.
Lower the heat and add minced garlic and red pepper flakes (if using) to the skillet. Sauté for about 1 minute, being careful not to burn the garlic.
Pour in the chicken broth and lemon juice, stirring to combine. Let the sauce simmer for about 3-5 minutes, allowing it to reduce slightly.
Taste and adjust seasoning if necessary. Remove from heat.
Serve the chicken scampi over a bed of creamy garlic Parmesan rice and garnish with freshly chopped parsley.