Step 1 : Introduction to the question "What are the two main ingredients in the traditional (U.S) Southern dish "Hoppin' John?""
...Hoppin' John, also known as Carolina Peas and Rice is a peas and rice dish served in the Southern United States. It is made with black-eyed peas (or red cowpeas such as iron and clay peas in the Southeast US) and rice, chopped onion, sliced bacon, and seasoned with salt. Cuisine of the Southern United States - Wikipedia
(Turnip greens are the typical greens for such a meal; they're cooked with some diced turnip and a piece of fatback.) Other low-meat Southern meals include beans and cornbread—the beans being pinto beans stewed with ham or bacon—and Hoppin' John (black-eyed peas, rice, onions, red or green pepper, and bacon).