Grease a 9x13 baking pan.
In a large bowl, combine the cooked chicken, cooked pasta, cream of chicken soup, broth, milk, 1/2 container of fried onions, veggies, garlic, seasoning salt, and 1/2 cup cheddar cheese.
Spread mixture into prepared baking dish.
Sprinkle remaining cheddar cheese on top and cover pan with foil.
Place in preheated oven, 350 degrees, and bake for 25 minutes.
Remove foil and sprinkle remaining container of fried onions evenly on top.
Bake an additional 5 minutes.
Remove from oven and serve! Enjoy!