Native to Southeast Asia, water chestnuts are the tubers of a water plant. They resemble chestnuts in shape and color, but their white flesh is crunchy and juicy.
To store jarred or canned water chestnuts, rinse and transfer them to a nonmetal container. Cover water chestnuts with water and refrigerate them for up to one week; change the water every few days.
Serve this creamy casserole with grilled ham. Complete the meal with pumpkin pie.