The term 'Kind of Onion' refers to three different types of onions. The first is the BERMUDA onion, which is a sweet onion with a mild flavor and a light yellow-brown color. The second is the Vidalia onion, which is a sweet onion that is grown in the US state of Georgia. The third is the PEARL onion, which is a small, white onion with a mild flavor. All three of these onions are commonly used in cooking and can be found in many recipes.