Bring chicken broth, potatoes, carrots, and onion to a boil and turn down heat to simmer. Cook until vegetables are done. Add stick butter, 1/2 & 1/2, cream and seasonings, Heat 10 minutes or longer, add all of the seafood. Bring to a simmer and add velveeta in chunks, stir until the cheese is dissolved. Add cornstarch mixture to thicken. Simmer for another 10 minutes stirring very often with a spatula to keep bottom of pan free from sticking. Cheese will cause to stick and burn on bottom. Serve/// You may have to add salt to taste. If you need more liquid, add either chicken broth or plain milk.