ABOUT THE BEANS: Use any kind of white beans: the smaller navy beans, the medium-sized Great Northern, or the large cannelini. If you're using canned beans, use 2 cans.
ABOUT THE GREENS: The recipe calls for collard greens, but you can also use escarole or spinach--or a comination.
TOPPINGS:
Freshly-grated nutmeg
Finely minced fresh parsley
Parmesan cheese