Mable Clarke, a South Carolina cook and activist, serves this collard greens recipe at monthly fish fries to support the Soapstone Baptist Church in the community where she grew up. There, farmers' markets overflow with big, leafy collards that are typically simmered with ham stock to make up this traditional Southern side dish. Clarke uses premade ham stock but it can be hard to find. We adapted the recipe with chicken broth and a ham bone or hock. As the bone simmers it adds flavor to the broth and yields enough meat to serve with the collards.