In a large bowl, combine ground chicken, breadcrumbs, Parmesan cheese, egg, garlic, salt, and pepper. Mix gently until just combined. Do not overmix.
Form the mixture into meatballs, about 1-inch in diameter.
Heat olive oil in a large skillet over medium heat. Add the meatballs and cook, turning occasionally, until browned on all sides and cooked through, about 8-10 minutes. Remove meatballs from skillet and set aside.
In the same skillet, whisk in flour and cook for 1 minute. Gradually whisk in chicken broth and lemon juice. Bring to a simmer, stirring constantly. Add capers and cook for 2-3 minutes, or until the sauce has thickened slightly.
Reduce heat to low. Stir in butter, one cube at a time, until melted and the sauce is smooth and glossy. Season with salt and pepper to taste.
Return the meatballs to the skillet and toss to coat with the sauce. Simmer for 5 minutes to allow the flavors to meld.
Notes
Serve Chicken Piccata Meatballs over pasta, mashed potatoes, or rice. Garnish with fresh parsley, if desired.