In a large mixing bowl, combine the ground chicken, breadcrumbs, egg, 2 cloves of minced garlic, salt, and pepper.
Divide the mixture into 4 equal portions and shape into patties approximately 3/4 inch thick.
Heat olive oil in a large skillet over medium heat.
Place the patties in the skillet and cook for 5 to 6 minutes per side until the internal temperature reaches 165°F (74°C) and the exterior is golden brown.
Transfer the cooked patties to a warm plate and set aside.
In the same skillet over medium-low heat, melt the butter.
Add the remaining 4 cloves of minced garlic and sauté for 60 seconds until aromatic.
Pour in the chicken broth and lemon juice, scraping any browned bits from the bottom of the pan.
Simmer the sauce for 3 minutes until slightly reduced.
Return the patties to the skillet, spooning the garlic butter sauce over them to coat thoroughly.
Garnish with fresh parsley and serve immediately.