These chicken Cordon Bleu meatballs are ham-stuffed chicken meatballs topped with a creamy Swiss cheese sauce. They are delicious served over zucchini noodles, mashed cauliflower, or simply on their own! A great way to use up leftover ham. I've used diced ham, however cubed ham works better as the meatballs keep their shape better. Grate your own cheese; it melts much better than the pre-shredded variety.