01 -
Preheat your oven to 375 degrees (190°C).
02 -
Cook the lasagna noodles according to package instructions. Drain and set aside.
03 -
In a pan, sauté the chopped onion and minced garlic until soft and fragrant. Add the cooked chicken, cream of chicken soup, heavy cream or milk, diced tomatoes if using, Italian seasoning, salt, and pepper. Stir everything together well and let it simmer for about 5 minutes.
04 -
In a baking dish, start layering: first a layer of noodles, then a layer of the chicken mixture, then a layer of cheese (use a mix of mozzarella and cheddar). Repeat the layers, finishing with a generous layer of cheese on top.
05 -
Bake for 25 to 30 minutes, until the casserole is bubbly and the cheese on top is golden brown.
06 -
Let the casserole rest for 5 to 10 minutes before cutting - this helps it set up and makes it easier to serve. Garnish with fresh parsley and enjoy!