01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, combine ground chicken, sun-dried tomatoes, Parmesan, breadcrumbs, egg, garlic, parsley, oregano, salt, and black pepper. Mix gently until just combined.
03 - Form mixture into 16-18 small meatballs, about 1.5 inches each.
04 - Heat olive oil in a large skillet over medium heat. Sear meatballs in batches until golden brown on all sides, about 4–5 minutes total.
05 - Arrange seared meatballs on the prepared baking sheet and bake for 10–12 minutes, or until cooked through (internal temperature 165°F).
06 - In the same skillet, melt butter over medium heat. Add shallot and sauté for 2–3 minutes until softened.
07 - Stir in heavy cream, chicken broth, Dijon and whole-grain mustards. Bring to a gentle simmer and cook for 3–4 minutes, stirring frequently.
08 - Add Parmesan cheese and season with salt and black pepper to taste. Simmer for 2 more minutes until slightly thickened.
09 - Return baked meatballs to the skillet and coat in the sauce. Simmer together for 2–3 minutes to meld flavors. Garnish with fresh parsley if desired. Serve hot with rice, mashed potatoes, or crusty bread.