Start by combining ground chicken, egg, panko, Parmesan, and seasoning in a large mixing bowl. Use a fork or your hands to mix it all thoroughly without overworking. Once combined, shape the mixture into small, even-sized meatballs using a cookie scoop or wet hands.
Heat a splash of olive oil in a large skillet over medium heat. Place the meatballs in the pan and cook until browned on all sides, about 3-4 minutes per side. Don’t worry about cooking them through at this point; you’ll finish them in the sauce. Transfer the browned meatballs to a plate and set aside.
Using the same pan, add minced garlic and sliced peppers. Sauté for about 5 minutes, allowing the peppers to soften slightly. If the pan seems dry, deglaze it with a splash of water or white wine to lift any flavorful browned bits stuck at the bottom. Stir in the tomato sauce and kosher salt, then bring the sauce to a gentle simmer.
Nestle the browned meatballs into the sauce, ensuring they are mostly covered. Cover the skillet partially and cook for another 10-12 minutes, or until the meatballs are fully cooked and reach an internal temperature of 165°F.
While the sauce simmers, bring a pot of salted water to a boil and cook the orzo according to package instructions. Once al dente, drain and immediately toss with mascarpone or butter, ensuring the pasta becomes creamy and flavorful.
Serve each portion with a generous helping of creamy orzo, a few tender meatballs, a few spoonfuls of the sauce with peppers, and a sprinkle of parsley and Parmesan for garnish.